How to prevent corrosion risks during pickling of precision castings

Precision casting is the part processing method of choice for many industries that have strict requirements on parts. Precision casting is more advanced than traditional casting technology, and precision casting has better appearance quality and high dimensional accuracy. Some can be used directly without cutting, for Businesses save costs.

Precision casting has many advantages, but its processing technology is very complex. It requires multiple processes such as molds, melting, pouring, cutting, rough grinding, pickling, etc., and then a series of processes such as electroplating, enamel, and rolling. Among them, pickling It is a very important link and a dangerous process. Pickling of investment castings generally involves immersing the castings in an acid solution to remove various oxides and corrosives on the steel surface through chemical reactions. If the pickling is done well, the next A one-step passivation process would be much simpler.

Before pickling, precision castings should be treated with polishing, polishing, sandblasting and other mechanized methods to remove impurities and attachments on the surface. If it is still difficult to remove complex chemicals, you need to clean the casting surface with clean water, which can not only remove Dust and other substances on the surface of the casting can also enrich the pores on the surface of the casting to facilitate cleaning in subsequent chemical treatments.

The pickling process of precision castings has certain risks, and the pickling solution has a certain corrosive effect. If the worker's skin is contaminated by acid during the pickling process, it should be washed with clean water immediately, and the workplace should be equipped with the required drugs.