Acidic liquid degreasing solution provides mild degreasing, cleaning and very mild formation of phosphate on metal components. It can be diluted with 5 times of volume of industrial water. For a better performance on more rusted components, the dilution ratio may be accordingly reduced. Painting should be done on the treated components immediately after wiping of with dry cloth. White patches should be wiped off. If the white patches are aggressive the solution may further be diluted.
Acidic liquid degreasing solution provides mild degreasing, cleaning and very mild formation of phosphate on metal components. It can be diluted with 5 times of volume of industrial water. For a better performance on more rusted components, the dilution ratio may be accordingly reduced. Painting should be done on the treated components immediately after wiping of with dry cloth. White patches should be wiped off. It the white patches are aggressive the solution may further be diluted.
| # | Materials | Quantity, kg |
| 1 | Phosphoric acid 80% solution | 26 |
| 2 | Butyl cellosolve | 5.5 |
| 3 | Ethyl cellosolve | 18 |
| 4 | Water | 50 |
| 5 | Sodium hexametaphosphate | 0.5 |
| Yield | 100 |
Raw materials:
- Phosphoric acid solution
concentration may be of 80 to 85% of industrial grade. - Butyl cellosolve and
ethyl cellosolve are industrial grade organic solvents. If ethyl cellosolve is
not available, it can be replaced by butyl cellosolve. However, it may slightly
affect the performance of the cleaning action. - Industrial water is
ideal for the making up the solution. Hard water may disturb the performance of
the solution. - Sodium hexametaphosphate
is a mixture of polymeric metaphosphate surfactant. It also acts a sequestering
agent. It is available in the powder
form.
Procedure
- Dissolve item 5 in 4 in
a stainless steel or plastic container using a mixer. - Add item 1 followed by
items 2 and 3 - Ensure thorough mixing
Features of liquid acidic degreaser
- Mild steel and aluminium components can be
cleaned with this solution - Dilution ratio for applying on the metal: 1:5 in
industrial water. - Application: By brushing or swabbing using
proper gloves. Should be wiped off immediately with dry cloth after the
formation of thin and mild phosphate layer. - Should be painted within an hour.
- Caution: Leaving the substrate with this
solution without wiping may lead to formation of mild rust.
Other Recommendations
In case of aggressive condition of the surface of the metal components, the following sequence of operations may be adopted.
- Sanding with emery
sheets of various grades - Solvent degreasing with
cleaning thinner (Formula guidelines included) - Air drying
- Application of acidic
liquid degreasing solution - Dry wipe off
Formulation of cleaning thinner
| S No. | Raw materials | Quantity (kg) |
| 1 | Mixed Xylene | 50 |
| 2 | Acetone | 30 |
| 3 | n-Butanol | 6 |
| 4 | Methyl isobutyl ketone | 4 |
| 5 | n-Butyl acetate | 7 |
| 6 | Ethyl cellosolve | 3 |
| Total | 100 |
*Can be mixed using a mechanical stirrer.
