1, pickling and passivation, for the first time, test on the local parts of the small parts or similar materials should be done first.
2, operators must wear acid proof clothing, gloves, masks and protective goggles while operating。 Acid pickling in containers must be carried out with qualified gas masks and conducted under special guardianship。
3, during the pickling process, operators must be careful and careful to observe in time to prevent excessive surface corrosion。 Effective measures should be taken for carbon steel parts to prevent corrosion。
4。 After pickling, the stainless steel surface must not have obvious corrosion marks, and there should be no uneven markings。
5. When mixing the liquid, the water should be put proportionally into the acid proof container, then slowly add acid to the ratio, so as to prevent the acid falling too fast and cause splashing and hurting people.
6. Stainless steel parts with anticorrosion requirements are treated by heat treatment after drawing, and pickled and passivated.
7, pickling and passivation formula and operation, concentration, volume ratio, liquid temperature and operating time can be adjusted according to circumstances. The pickling and passivation solution can be used repeatedly, but the proper concentration and volume ratio must be ensured.