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Powder coating standards
For finishes made with Polyester epoxy powder coat on nano-treated mild steel components. All tests are conducted on panels as recommended in ASTM standards. # Tests Parameters Test Methods Colour L*a*b readings of less than 0.3 under cool white light to RAL Shades Ref. RAL Shade cards Gloss 60 +/- 10 at 60o at…
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Degreasing bath control parameters
Degreasing bath control parameters S. No. Details Parameters Bath concentration for immersion 5% Bath temperature 30 deg. C min. 60 deg. C max. Immersion time 5 minutes to 10 minutes Free alkali, points 20 to 35 Total alkali / Free alkali ratio < 3.0 Testing and Control: Warning: Do not…
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Acrylic emulsion paints formulation guidelines
Acrylic Emulsion Guidelines – List of Raw Materials S.No. Raw Materials Popular Brand Names Vinyl acetate co-polymer inter platicised emulsion-55% solids Usage: Acrylic distemper, interior primer and acrylic wall putty Visicryl 6155 Min. pack: 220 kg Vam Veova co-polymer, 55% solids Usage: Interior, exterior emulsion and exterior primer Visicryl 4056 Min. pack. 220…
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How to clean the test panels
The tested panels should be washed with gentle spray without disturbing the colonial growth of microorganisms. The follow video demonstrates how to clean the tested panel before taking up for microscopic examinations.
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Sandblasting or phosphating or both?
Do we need phosphating after sand blasting followed by powder top coat on hot rolled steel components? No. It is not necessary if the salt spray resistance required is less than 550 hours. The purpose of sand blasting is to improve the surface profile of the component with a surface free from rust and heavy…
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Ethyl acetate
A technical write up on ethyl acetate Introduction Government regulations and social concerns about environmental preservation and depletion of resource have made the solvents industry facing a major push towards green innovation. Solvents are integral components in a vast number of chemical processes and products, and are used in a wide variety of industrial applications…