1, stress relief before plating where the maximum tensile strength is greater than 1034Mpa key and important parts before plating should be at 200±10℃ stress relief for more than 1 hours, carburizing or surface quenching parts should be at 140±10℃ stress relief for more than 5 hours.
2. The cleaning agent used for cleaning should have no effect on the binding force of the coating and no corrosion on the matrix.
3. Acid activation acid activation solution should be able to remove corrosion products and oxide film (skin) on the surface of parts, without excessive corrosion on the matrix.
4, galvanized can be used zincate galvanized or chloride galvanized process, should use appropriate additives to meet the requirements of this standard coating.
5, after the light plating should be carried out light treatment.
6, passivation to remove hydrogen parts should be passivation after the removal of hydrogen, passivation before the application of 1%H2SO4 or 1% hydrochloric acid activation 5~15s. Passivation shall be treated with colored chromate unless otherwise specified in the design drawings.
Post time: 10-04-23