» Pretreatment for Mild Steel

DEGREASING :- Removal of oil, grease & carbonaceous deposits from ferrous surface.
PRODUCT |
NATURE |
CONC. |
TIME |
TEMP. |
KLINOL SERIES |
Alkaline Degreasing |
5% w/v |
10-15 min |
RT to 65°C |
OLOSOL SERIES |
Acidic Degreasing |
25% v/v |
10-15 min |
RT |
DERUSTING :- Removal of rust and scale from ferrous surface.
PRODUCT |
NATURE |
CONC. |
TIME |
TEMP. |
RUSTOSOL |
Acidic Descaling |
33-50% v/v |
10-15 min |
RT |
RUSTOSOL SERIES |
Acidic Derusting |
25-33% v/v |
10-15 min |
RT |
2 IN 1 CHEMICALS :- Derusting Chemicals with excellent degreasing properties.
PRODUCT |
NATURE |
CONC. |
TIME |
TEMP. |
RUSTOL SERIES |
Emulsified Acidic Derusting |
25% v/v |
10-15 min |
RT |
ACTIVATION :- Gives compact & uniform coating of zinc phosphate.
PRODUCT |
NATURE |
CONC. |
TIME |
TEMP. |
MOD |
Acidic activation |
1% w/v |
2-3 min |
RT |
MOD-SUP |
Alkaline activation |
0.2-0.3% w/v |
2-3 min |
RT |
PHOSPHATING :- Light to Medium weight(class C) Phosphate Coating For Paint Adhesion :
PRODUCT |
NATURE |
CONC. |
TIME |
TEMP. |
PHOSCOAT Z |
Medium weight Zinc Phosphate |
5% v/v |
15-20 min |
RT to 65° C |
PHOSCOAT TZ |
Light Zinc Phosphate |
5% v/v |
15-20 min |
RT |
PHOSCOAT I |
Extra Light Iron Phosphate |
5% v/v |
5-7 min |
RT |
PASSIVATION :- Seals the pores of phosphate coating.
PRODUCT |
NATURE |
CONC. |
TIME |
TEMP. |
PASS |
Chromic acid based chemical |
0.1% v/v |
1 min |
RT to 80° C |
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3 IN 1 CHEMICALS
Phosphoric acid based cleaners which performs 3 functions of degreasing, derusting & coating - deposition of minute coat of iron phosphate on ferrous surface and hence named so. As the processes of cleaning & coating are combined in a single tank, the system is also called as Cleaner-Coater System.
The process is easy to install and operate. However, the adhesion and life of the paint/ powder coat are not as much as that attained with eight tank process.
The process may be employed where the compromise with the adhesion and life of the coating is not objectionable, the process being economical and easy to operate. This process may also have to be used for very large size articles which can not be dipped in the eight tank process.
PRODUCT |
NATURE |
CONC. |
TIME |
TEMP. |
PRIME SUP 31 |
For heavy rust & heavy oil. |
25% v/v |
10-15 min |
RT |
PRIME SUP |
For heavy rust & light oil. |
25% v/v |
10-15 min |
RT |
PRIMOL 31 |
For medium rust & heavy oil. |
25% v/v |
10-15 min |
RT |
PRIME 31 |
For medium rust & medium oil. |
25% v/v |
10-15 min |
RT |
There are three ways of using 3 in 1 chemical.
- Conventional dipping process as shown above.
- Dipping followed by immediate wiping with dry cloth.
- Wiping with 3 in 1 chemical, followed by immediate wiping with dry cloth.
Depending upon the nature of article, the best way among the above three should be selected, consulting the technical person of M/s Dimetrics.
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