What you don’t know about pickling passivation?

There are many things you do not know about pickling and passivation. Let me explain to you below.

Purpose of pickling and passivation:

Usage: Passivating stainless steel by acid pickling, removing all kinds of dirt such as oil, rust, oxide, welding spot, etc. After treatment, the surface becomes uniform silver-white, which greatly improves the corrosion resistance of stainless steel. It is suitable for various types of stainless steel parts, plates and equipment.

Characteristic of pickling and passivation

Features: Simple operation, convenient use, economical and practical, while adding effective corrosion inhibitor, mist inhibitor, to prevent metal corrosion and hydrogen embrittlement, inhibit the generation of acid mist. Especially suitable for small complex workpieces, not suitable for pasting, better than similar products in the market.

Usage of pickling and passivation

Usage: According to the different material and oxide scale severity of stainless steel, it can be diluted with original solution or water in proportion of 1:1~4; austenitic stainless steel with low ferrite, martensite and nickel content (e.g. 420, 430, 200, 201, 202, 300, 301, etc.) can be diluted and used; austenitic stainless steel with high nickel content (e.g. 304, 321, 316, 316L, etc.) can be immersed in original solution. Usage at room temperature or after heating to 15-30 degrees, soak for 5-15 minutes or longer (specific time and temperature determined by users according to their own trial), until the surface dirt is completely removed into uniform silver-white, forming uniform and dense passivation film, remove after treatment, rinse with clean water, preferably rinse with alkali water or lime water and neutralize.

The above is the knowledge of pickling passivation,if you want to know more, you can contact us.Email:sales@haihaogroup.com