1.Where the maximum stress before plating eliminate tensile strength greater than 1034Mpa critical and important member should be removed before plating at 200 ± 10 ℃ stress than one hour, or surface hardening carburizing member should eliminate stress over 5 hours at 140 ± 10 ℃.

2.Cleaning agents used to clean coating adhesion response had no effect, no corrosion of the substrate.

3.Acid-activated acid activation solution should be capable of removing parts of the surface corrosion products, an oxide film (skin), to the substrate without excessive corrosion.

4.You can use galvanized galvanized zinc or zinc salts such as zinc chloride process, should be used to obtain suitable additives to meet the requirements of this standard coating.

5.It should be a light coating of light treatment.

6.In addition to hydrogen passivation of parts required to be carried out after removing hydrogen passivation, passivation applied before or 1% 1% H2SO4 activated with hydrochloric acid 5 ~ 15s. Unless otherwise specified in the design, color chromate passivation process should be used.

Previous:Galvanized wire surface quality requirements

Next:Cold Roberts also called raw silk