By Dr E. Ramanathan PhD
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Table of Contents
Part I: Fundamentals of Metal Pretreatment
- Introduction to Metal Pretreatment
- Purpose and Importance in Surface Preparation
- Overview of Processes: Degreasing, Derusting, Conditioning, and Coating
- Metal Surfaces and Their Challenges
- Types of Metals and Alloys
- Common Surface Issues: Rust, Oil, Contaminants
- Principles of Metal Surface Chemistry
- Surface Energy and Adhesion
- Role of Pretreatment in Coating Performance
Part II: Degreasing Chemicals
- Introduction to Degreasing
- Basics of Detergent or Degreasing Agent
- Purpose of Degreasing in Metal Treatment
- Types of Contaminants (Oils, Grease, Dust)
- Types of Degreasing Chemicals
- Solvent-Based Degreasers
- Alkaline and Acidic Cleaners – Alkaline degreaser
- Water-Based Degreasers
- Alkaline Degreasing Formulations – Set-1, Set-2
- Application Techniques
- Immersion, Spray, and Ultrasonic Degreasing
- Safety and Environmental Considerations
- Case Studies
Part III: Derusting Chemicals
- Introduction to Derusting
- Types of Rust and Corrosion – Derusting
- Importance of Removing Oxides Before Coating
- What is desmutting?
- Types of Derusting Chemicals
- Acid-Based Rust Removers (Hydrochloric, Phosphoric)
- Neutral and Eco-Friendly Derusting Agents
- Chelating Agents for Controlled Rust Removal
- Three in one solution
- Testing and Quality Control
- Ensuring Effective Rust Removal
- Preventing Over-Etching or Metal Damage
Part IV: Surface Conditioning
- Purpose of Surface Conditioning
- Enhancing Surface Reactivity
- Preparing for Subsequent Treatments
- Conditioning Agents
- Alkaline and Acid-Based Conditioners
- Role of Wetting Agents and Surfactants
- Application and Optimization
- Ensuring Uniform Surface Preparation
- Troubleshooting Issues in Conditioning
- Formulations of Surface Conditioners
Part V: Phosphating Chemicals
- Overview of Phosphating
- Role in Corrosion Protection and Adhesion Promotion
- Types of Phosphating Processes (Zinc, Iron, Manganese)
- Types of Zinc phosphating
- Difference between Zinc phosphating and Zinc plating
- Phosphating Chemicals
- Formulations for Cold, Hot, and Microcrystalline Phosphating
- Technical Tips for Zinc phosphating formulators
- Role of Accelerators and Stabilizers
- Manganese phosphating
- Application Methods
- Spray, Dip, and Roll Coating Techniques
- Controlling Coating Thickness and Uniformity
- Testing of Phosphating Layers
- Coating Weight and Thickness
- Corrosion Resistance Testing (Salt Spray, Electrochemical Tests)
Part VI: Passivation Chemicals
- Introduction to Passivation
- Role in Protecting Metal Surfaces
- Passivation vs. Phosphating
- Types of Passivation Chemicals
- Chromate-Based Systems
- Non-Chromate and Eco-Friendly Alternatives
- Application and Benefits
- Improving Corrosion Resistance
- Compatibility with Paints and Coatings
Part VII: Rust Preventive Oils
- Introduction to Rust Preventive Oils
- Role in Temporary Corrosion Protection
- Applications in Manufacturing and Storage
- Types of Rust Preventive Oils
- Solvent-Based, Water-Based, and Oil-Based Systems
- Additives for Enhanced Performance
- Application Techniques
- Spraying, Brushing, and Immersion Methods
- Compatibility with Subsequent Coating Processes
- Testing and Standards
- Humidity and Salt Spray Testing
- Shelf Life and Long-Term Performance Evaluation
Part VIII: Equipment and Application Techniques
- Overview of Pretreatment Equipment
- Tanks, Spray Systems, and Conveyors
- Automation in Pretreatment Processes
- Optimizing Pretreatment Parameters
- Temperature, Time, and Concentration Control
- Monitoring and Maintenance of Baths
Part IX: Safety, Environment, and Compliance
- Safety Practices in Metal Pretreatment
- Handling of Acids, Solvents, and Corrosive Chemicals
- PPE and Worker Safety Protocols
- Environmental Considerations
- Waste Management and Effluent Treatment
- Eco-Friendly Alternatives in Pretreatment
- Regulatory Compliance
- Global Standards (REACH, RoHS, OSHA)
- Industry-Specific Requirements
Part X: Innovations and Market Trends
- Advancements in Pretreatment Chemicals
- Nano-Phosphating and Conversion Coatings
- Hybrid Pretreatment Systems
- Trends in Sustainability
- Zero Discharge Technologies
- Bio-Based and Renewable Chemicals
- Market Insights
- Key Players and Global Market Trends
- Future Opportunities in Pretreatment
Part XI: Practical Knowledge and Case Studies
- Case Studies in Pretreatment
- Challenges and Solutions in Industrial Applications
- Successful Implementation of Advanced Systems
- Troubleshooting Guide
- Common Problems and Their Solutions
- Ensuring Consistent Quality in Pretreatment
Part XII: Appendices
- Glossary of Pretreatment Terms
- Standard Operating Procedures (SOPs)
- References and Further Reading
- Index
Formulation Cards
SaitechAI — Technical Notes Non-Ionic Surfactants — Overview Non-ionic surfactants are surface-active agents that do not carry any electrical charge in their hydrophilic (water-loving) head group. Their molecules generally contain polyoxyethylene (EO) or polyoxypropylene (PO) chains linked to a hydrophobic (oil-loving) tail such as a fatty alcohol or alkyl phenol.Common types include: Fatty alcohol ethoxylates…
Dr E. Ramanathan PhD Chat on WhatsApp Coating Operator’s Toolkit Contents SaitechAI Metal Pretreatment Chemicals Formulator’s Toolkit. It includes: Dilution (C₁V₁ = C₂V₂) Normality / Molarity helpers FA/TA titration calculators + FA/TA ratio ppm ⇄ g/L ⇄ % w/v converter Replenishment dosage Drag-out loss estimator Coating weight (g/m²) Cost per bath liter & cost per…
https://youtu.be/YDYWKiPnOjg?si=rC6Y2D4axc4gfiY9 SaitechAI: Source Doc. Dr Ramanathan’s technical manuscripts and Verified by Ms. Pavani CauseEffect on Bath / SurfaceRemedy / Corrective ActionCarryover of oil/grease from previous operations (machining, stamping, forming oils)Floating oil film, poor acid-metal contactIntroduce/strengthen alkaline degreasing step before derustingInadequate or bypassed pre-cleaning stageNon-uniform derusting, patchy cleaningEnsure proper hot alkaline cleaning/emulsion cleaning stageDrag-in of oil…
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Dr E. Ramanathan PhD
Case Study The middle image: untreated Hot rolled steel, The left image: two stage iron phosphated HR sheet, The right image: two stage iron phosphated CR sheet Discuss. Observation, causes, remedies Observation Middle (Untreated Hot Rolled Steel):Heavy mill scale, uneven oxidation, rust spots, and burn marks visible. Surface contamination is…Continue Reading Iron Phosphating on Hot Rolled Steel Components
Dr E. Ramanathan PhD
A paint stripper (also called a paint remover) is a chemical product designed to remove paint, varnish, lacquer, or other coatings from surfaces such as wood, metal, masonry, or plastic. Need and Importance of Paint Stripping 1. Surface Preparation for Recoating Paint stripping ensures that old, degraded, or incompatible coatings…
Dr E. Ramanathan PhD | Nano Coating Consultant | Email: eramanath@gmail.com Select your language
Three-in-One Solution – Definition and Use A three-in-one solution is a single-step chemical treatment designed for ferrous metals (mainly mild steel) that combines: Mild Degreasing – removal of light oil and shop soil. Cleaning / De-rusting – dissolves light rust…Continue Reading Three in one Solution for cleaning mild steel
Cold Phosphating (Room Temperature Phosphating) Operating Temperature: 25–40 °C (room temperature). Chemistry: Modified phosphoric acid + accelerators + activators; usually manganese or zinc-based. Coating Type: Produces a thin, amorphous or microcrystalline phosphate film. Film Weight: Typically 0.2–1.0 g/m² (very light). Advantages: Lower energy cost (no heating required). Simpler plant layout and equipment. Good for touch-up,…
Highlights What is HR Sheet? Cleaning HR Sheets Industrial Racking System Importance of Iron phosphating HR Sheets CAS No.s of Raw Materials of Iron phosphating chemicals Formulations of Iron phosphating Case Studies Formulation of Descaling Chemicals Trouble shooting What is HR Sheet? https://saitechinfo.com/hr-sheets/ Importance of Two Stage Iron Phosphating Two-stage iron phosphating on HR (Hot…
HR Sheets in Racking Systems Hot Rolled (HR) sheets are widely used in the design and fabrication of industrial racking systems (such as warehouse storage racks, pallet racks, and shelving systems). Their role is mainly structural, providing load-bearing strength and durability. Where HR Sheets are Used in Racking Systems Base Plates & Brackets HR sheets…
HR Sheet (Hot Rolled Sheet)HR sheet refers to Hot Rolled Steel Sheet. It is produced by rolling steel at a very high temperature (above the recrystallization temperature of steel, usually > 900°C). This makes the steel easier to form and shape. HR sheets generally have a rough surface finish, less dimensional accuracy compared to cold…
EHS (Environment, Health & Safety) Policy draft tailored for a surface treatment / phosphating + pickling line. 1. Commitment We are committed to conducting all operations in a manner that safeguards: Employee health & safety Environmental protection Regulatory compliance Community well-being Our goal is Zero Harm to people, equipment, and the environment. 2. Scope This…
Dr E. Ramanathan
1. Purpose and Importance in Surface Preparation Metal pretreatment refers to the series of chemical and/or mechanical processes applied to a metal surface before painting, powder coating, electroplating, or other protective coatings. Its primary purposes are: Cleaning: Removal of oil, grease, rust, dust, and other contaminants. Surface activation: Increasing surface energy…
by Dr E. Ramanathan PhD, Coating Consultant Coalescers in Alkaline Degreasing Baths: What They Are and How They Help A coalescer is a chemical or mechanical system that helps merge small oil droplets into larger ones, making it easier to remove them from the degreasing bath. Coalescers are useful in alkaline degreasing when oil tends…
Continue Reading Role of Coalescers in Alkaline Degreasing Bath
Colourless chromatising on aluminium is a surface treatment process that enhances corrosion resistance and provides a good base for subsequent painting or adhesive bonding, without imparting any visible colour. It is typically based on trivalent chromium (Cr³⁺) compounds as a safer alternative to hexavalent chromium (Cr⁶⁺). Key Features: Appearance: Clear or slightly iridescent, virtually colourless.…
Dr E. Ramanathan Sodium dihydrogen phosphate (NaH₂PO₄) serves multiple roles in metal pretreatment chemicals, particularly in phosphating and cleaning formulations: Buffering Agent: Maintains acidic pH (typically 4.0–5.5) in phosphating baths. Stabilizes pH during pretreatment to ensure consistent phosphate coating formation. Source of Phosphate Ions: Contributes monobasic phosphate ions, aiding in forming uniform phosphate conversion coatings…
Continue Reading The Role of Sodium dihydrogen phosphate in Metal Pretreatment Chemicals
Dr E. Ramanathan PhD
Contents What is Desmutting ? Bath Formulation Details Lab Scale Concentrate Formulations FAQ-1 FAQ-2 Desmutting is a chemical process used after acid or alkaline etching (especially in aluminum surface treatment) to remove the residue or “smut”, which is typically composed of insoluble intermetallic particles or oxides left behind. Purpose: Ensures…
Dr E. Ramanathan PhD Difference Between Aluminium Cleaner and Aluminium Brightener Before attempting the brightener formulations let us study the differences between a cleaner and a brightener. Please note that the brightners are used only after cleaning aluminium components with the regular aluminium cleaners. FeatureAluminium CleanerAluminium BrightenerPrimary PurposeRemoves dirt, grease, oil, carbon, and dustRemoves oxides,…
Dr E. Ramanathan PhD https://youtu.be/_UohhDqEdoM?si=mjBnIhLRB-2t8XRh Aluminium — light in weight, strong in structure, and resistant to corrosion — plays a vital role across multiple sectors. From aerospace and automotive to construction, packaging, marine, and electronics, aluminium is the metal of choice for performance, sustainability, and aesthetics. But preserving its brilliance and ensuring proper surface preparation…
Selection of cleaning chemical for different types of aluminium
Continue Reading Aluminium Types and Selection of Cleaning Chemicals
Surface conditioner prior to zinc phosphating – two formulations compared
Dr E. Ramanathan PhD
Surface conditioning is a pre-treatment step before zinc phosphating, aimed at enhancing coating uniformity and reducing coarse crystal formation. Formulation Overview (Total = 1 kg) ComponentAmount (g)FunctionSodium fluoride60Activator; helps in micro-etching, increases surface energyPotassium titanium fluoride10Nucleating agent; promotes fine phosphate crystal formationSodium molybdate15Passivator; improves corrosion resistance and grain refinementAlphox (nonionic…
What is free acid? What is total acid? in phosphat coating bath solution
Continue Reading Determination of Free acids and Total acids in phosphating bath
Dr E. Ramanathan PhD
Determination of Iron in a Zinc Phosphate Coating Bath can be done by the following titrimetric or spectrophotometric methods. A commonly used method is titration with potassium dichromate in acidic medium using diphenylamine sulfonate as an indicator. 1. Reagents Required: 1 N H₂SO₄ (Sulfuric acid) 0.1 N K₂Cr₂O₇ (Potassium dichromate…Continue Reading Determination of iron in zinc phosphating tank
Dr E. Ramanathan PhD
White powders in trication phosphating can form due to the following reasons: Over-phosphating / Excess film build-up: When immersion or spray time is too long, excess phosphate crystals form, often loosely adherent and powdery. High pH: If the bath pH drifts above the control range (typically 4.7–5.3 for trication), zinc…Continue Reading Why white powders formed on phosphate coated panels
Excellent formulation guidelines
Continue Reading Two in One Solution – Degreasing & Derusting Formulation
Prerequisites for trication phosphating
Dr E. Ramanathan PhD Degreasing plants — whether batch-type, conveyorized, or fully automated — face several engineering problems that can affect productivity, safety, cleaning quality, and compliance. Below is a structured list of common engineering issues along with causes and remedies, tailored for plants handling metal cleaning with aqueous (alkaline or neutral) degreasers. 🔧 Common…
Continue Reading Common Engineering Problems in Spray Degreasing Plants
Dr E. Ramanathan PhD
Caustic-Free Alkaline Spray Degreasing Liquid Concentrate (100 kg batch) S.NoRaw MaterialQuantity (kg)Function1Sodium metasilicate (low Na₂O grade)5.0Mild alkaline builder2Sodium gluconate3.0Chelating agent, scale inhibitor3EDTA (Na₄)1.5Strong chelating agent for metal ions4Nonionic surfactant (Alphox 200)6.0Emulsifier and degreaser5Anionic surfactant (Sodium lauryl ether sulfate – SLES)4.0Foaming and detergency agent6Solvent (IPA or Butyl Cellosolve)5.0Oil dissolving and drying…Continue Reading Caustic Free Liquid Alkaline Degreaser Concentrate Formulation
Dr E. Ramanathan PhD 1. What is trication phosphating? Trication phosphating is a metal surface treatment process that deposits a crystalline phosphate layer using three metal cations—zinc (Zn²⁺), nickel (Ni²⁺), and manganese (Mn²⁺)—to improve corrosion resistance and paint adhesion. 2. What are the advantages of trication phosphating over zinc phosphating? Enhanced corrosion resistance Improved paint…
Dr E. Ramanathan PhD https://saitechinfo.com/what-is-trication-phosphating/ Formulations of Trication phosphating chemical Formula-1 A trication phosphating chemical formulation (zinc–nickel–manganese based) suitable for room temperature application (25–35°C) can be formulated as follows (for 100 L of working bath solution): NOTE: This formulation is intended for platers or phosphaters who want to do in-house phosphating in the tank directly.…
HEDP is highly acidic. Can we use in alkaline degreasing chemicals? Yes, HEDP (1-Hydroxyethylidene-1,1-diphosphonic acid) can be used in alkaline degreasing formulations, despite being highly acidic in its pure form, because: Key Points: Chelating Function in Alkaline pH: HEDP forms stable complexes with metal ions (Ca²⁺, Mg²⁺, Fe²⁺/Fe³⁺), even at pH 9–12, which is typical…
Dr E. Ramanathan 🔍 General Observations on General Formula: IssueCauseFixSuspended dirty particlesIncomplete emulsification or particle redepositionAdd dispersants or hydrotropes, reduce solidsLack of shineHigh alkaline load or poor rinsingReduce harsh alkalinity, add surfactant with rinse-aid effectCleaning power plateauingLimited surfactant blendBroaden surfactant system (non-ionic + low foam anionic or amphoteric) ✅ Improved Alkaline Liquid Degreaser Formula (Clear,…
Continue Reading Alkaline Liquid Degreaser Formulation to result better shining and cleaning
Dr E. Ramanathan PhD The two main types of zinc phosphate crystals formed during zinc phosphating on iron components are: 1. Hopeite (Zn₃(PO₄)₂·4H₂O) Appearance: Plate-like or blocky crystals Conditions: Formed in neutral to mildly acidic baths, especially when iron dissolution is minimal Properties: Dense, uniform coating Good paint adhesion Corrosion resistance 2. Phosphophyllite (Zn₂Fe(PO₄)₂·4H₂O) Appearance:…
Potassium titanium fluoride (K₂TiF₆) in place of titanium fluoride (TiF₄ or related forms like H₂TiF₆) in a surface activation or conditioning solution prior to zinc phosphating. In fact, potassium titanium fluoride is often preferred because: It is more stable in aqueous solution. It provides a consistent source of hexafluorotitanate ions (TiF₆²⁻), which are the active…
by Dr E. Ramanathan PhD Introduction to Metal Pretreatment Metal pretreatment refers to the series of preliminary processes applied to metal surfaces before applying any final coating or finish. It involves cleaning and preparing the metal so that subsequent steps (like painting, powder coating, plating, or adhesive bonding) achieve optimal results. In industrial practice, pretreatment…
by Dr E. Ramanathan Phd Standard testing methods for zinc phosphating are crucial to evaluate the coating weight, crystalline structure, adhesion, corrosion resistance, and overall quality of the phosphate coating. Here’s a rundown of the commonly used standard tests: 🧪 1. Coating Weight (Gravimetric Method) Standard: ASTM D 2091 / ISO 3892 Purpose: Measures the…
Continue Reading Standard Testing Methods for Zinc Phosphating
by Dr E. Ramanathan 📌 Zinc Phosphating – Key Parameters Free Acid (FA): Unreacted phosphoric acid. Controls aggressiveness. Total Acid (TA): Total acid content, includes both free and bound (complexed) acid. TA/FA Ratio: Indicates bath age and buffering. Ideal around 8–12. Free Iron (Fe²⁺): Accumulates with use. Should be controlled; excess inhibits coating. Nitrite Accelerator:…
Continue Reading Free Acids, Total Acids, Free Irons in Zinc phosphating Tanks
by Dr E. Ramanathan PhD Liquid degreasing chemical has the following characteristics: Alkaline base (pH > 9) Contains non-chlorinated surfactants and dispersants Includes corrosion inhibitors for mild steel and other metals Free from phenols, chromates, nitrites, and cresols Soluble in water Safe for ferrous and non-ferrous metals Can be used via immersion, wipe, ultrasonic, or…
Continue Reading Multimetal Liquid Degreasing Chemical Formulation
Sludge formation in phosphating occurs due to the precipitation of insoluble metal phosphates and other by-products. Key causes include: Excess iron dissolution: From steel surfaces, reacting with phosphate to form iron phosphate sludge. Calcium/magnesium impurities: In water or additives, forming insoluble salts. Overaging of bath: Depletion of free acid and acceleration of sludge due to…
Continue Reading The Issue of Sludges In Phosphate Coating Tanks
surface conditioner formulation
prior to zinc phosphating
Continue Reading Surface Conditioner Formulation prior to Zinc phosphating
Dr E. Ramanathan PhD
Chemistry of Acid Inhibitors Acid inhibitors are chemicals added to acid solutions (like HCl or H₃PO₄) to reduce the corrosive attack on base metals (e.g., steel) without significantly affecting the acid’s ability to remove rust or scale. Mechanism of Action Acid inhibitors work by adsorbing onto the metal surface and…Continue Reading Chemistry of Acid Inhibitors and Organic Derusters
Dip-Type Derusting Chemical Concentrate Formulation (100 L Stock) Designed for immersion applications on mild steel with heavy to moderate rust. Slower action than spray, but more thorough penetration. Target Dilution Ratio: 1:10 (stock : water) Stock Concentrate Composition ComponentQty (kg or L)PurposeHydrochloric Acid (33%)50 LStrong rust/scale removalPhosphoric Acid (85%)20 LPassivation, helps in mild derustingNon-ionic Surfactant…
Continue Reading Dip Type Derusting Chemical Concentrate Formulations
Formula-1 With HCl and H3PO4 to clean heavily rusted Mild Steel Components Stock Chemical Formulation for Spray Derusting (Concentrate) Used to remove rust (iron oxides) from ferrous surfaces prior to phosphating or coating. This stock concentrate is to be diluted on-site to make the working bath. Designed to make handling and dosing easier. Target Dilution…
Continue Reading Spray Type Derusting Chemical Concentrate Formulation
by Dr E. Ramanathan
Special Types of Nozzles for Spraying Phosphate Coating and Water Rinsing The choice of nozzle type in a phosphate spray system is critical for achieving uniform coating, efficient coverage, and minimal chemical waste. Different nozzles are used for phosphate solution application and water rinsing based on spray pattern, pressure, and…Continue Reading Special Types of Nozzles Used in Spray Phosphating
by Dr E. Ramanathan
Zinc Phosphating: Spray vs. Hot Immersion Process Zinc phosphating is a chemical conversion coating process used to enhance corrosion resistance, paint adhesion, and lubrication for subsequent coatings. The two main application methods are spray phosphating and hot immersion phosphating. Each method has its advantages and limitations depending on the substrate,…Continue Reading Zinc phosphating – Spray vs Hot Dip Processes
by Dr E. Ramanathan
Designing an Ideal Zinc Phosphating Bath A zinc phosphating bath is used for surface treatment of metals, primarily steel, to improve paint adhesion, corrosion resistance, and lubrication in cold-forming operations. An ideal bath formulation should ensure uniform phosphate coating, minimize sludge formation, and provide efficient deposition. 1. Bath Composition ComponentConcentration…Continue Reading How to design an ideal zinc phosphating tank
Blackening in phosphating can occur due to multiple factors related to surface contamination, bath composition, or process conditions. You can find a detailed analysis of possible causes and their remedies in this article.
by Dr E. Ramanathan Degreasing Formulations for Metal Cleaning Degreasing is a critical step in metal cleaning to remove oils, greases, and contaminants before surface treatments like phosphating, painting, or plating. Below are different degreasing formulations based on application needs. 1. Alkaline Degreasing Formulations Alkaline degreasers are widely used for ferrous and non-ferrous metals, offering…
Metal Pretreatments Introduction to Metal PretreatmentMetal pretreatment is a crucial step in surface preparation before painting, coating, or bonding. Theprocess ensures that metal surfaces are free from contaminants such as oil, grease, rust, and oxides,allowing for better adhesion, improved durability, and corrosion resistance of the final coating.Purpose and Importance of Metal PretreatmentEnhances adhesion between metal…
by Dr E. Ramanathan PhD
Metal finishers in India face several challenges that impact quality, efficiency, and profitability. These challenges can be categorized into technical, environmental, regulatory, and market-related issues. Here’s a detailed breakdown: 1. Environmental and Regulatory Challenges Stringent Pollution Control Norms: The Central Pollution Control Board (CPCB) and State Pollution Control Boards…Continue Reading Challenges Faced by Metal Finishers in India
by Dr E. Ramanathan , Coating Consultant
Alkaline degreasers based on caustic soda (NaOH) face several issues in winter, particularly with oil removal: Challenges of Caustic-Based Alkaline Degreasers in Winter: Poor Oil Emulsification in Cold Conditions: In low temperatures, oils and greases become more viscous and harder to remove. Caustic-based degreasers rely on saponification…
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Creating an effective degreasing powder involves selecting ingredients that can break down andemulsify grease and oils, lift dirt, and provide some level of abrasion for scrubbing. https://youtu.be/olfBvM2_q8U?si=0y52qWml3x7M80cv Degreasing Powder FormulationIngredients: Sodium Carbonate (Washing Soda) – 30-40% Sodium Metasilicate – 10-20% Sodium Tripolyphosphate (STPP) – 10-15% Sodium Bicarbonate (Baking Soda) – 10-15% Sodium Dodecyl Sulfate (SDS…
Trication phosphating formulation guidelines
Video Lecture: https://youtu.be/2f1ZdGcEi-M?si=ZkCt7zTioALIKbxk Question: @Balaram……. Sir, what are the basic functions of Zn,Ni & Mn respectively in phosphate coating. Answer by Dr E. Ramanathan In phosphate coatings, zinc (Zn), nickel (Ni), and manganese (Mn) play distinct roles in influencing the coating’s performance, appearance, and functional properties. Their primary functions are as follows: 1. Zinc (Zn):…
Continue Reading Roles of Zinc, Nickel and Manganese in Phosphate Coatings
by Dr E. Ramanathan PhD A Case Study in Manganese phosphating How to Reduce the Surface Roughness Value of Manganese Phosphate Coatings on Steel Components
Phosphating Chemical Formulations Metal Pretreatment Chemical Case Study Videos Phosphating Formulations https://www.youtube.com/live/Rw9MuLmR_G4?si=3kK0YBFfVip6sGEc Metal Pretreatment Chemical Case Study https://www.youtube.com/live/D6HR7pgoHwM?si=WUo5pv2jcnfpskOB
