The necessity of pickling seamless steel pipes

In order to improve the corrosion resistance of seamless steel pipes and prolong the service life of the products, the seamless steel pipes must be pickled and passivated to form a protective film on the surface.

First of all, we must understand what is pickling: the method of using acid solution to remove oxide scale and rust on the surface of steel is called pickling. Acids for pickling include sulfuric acid, hydrochloric acid, phosphoric acid and mixed acids.

seamless stainless steel pipe

The pickling process is to remove the surface oxide scale, and then go through lubrication treatment (carbon steel-phosphorous saponification, stainless steel-butter lime, copper and aluminum pipe-oiling), using the old process-copper plating), and then deep drawing processing. If the seamless steel pipe is not pickled, there may be oxides and oil stains on the surface, and the nuclear energy of the phosphating liquid cannot remove them, and the quality of phosphating will be reduced. Moreover, in the manufacturing process of seamless steel pipes, after many processes, if you are not careful, it will leave scars on the surface of seamless steel pipes, which will reduce the corrosion resistance of parts and directly affect the service life.

Pickling passivation of seamless steel pipes is a chemical reaction to remove rust on the surface of seamless steel pipes. Pickling and passivation of stainless steel can remove all kinds of dirt, such as oil stains, rust, oxide scale, welding spots, etc. After pickling and passivation of seamless steel pipes, the surface becomes uniform silver white, which greatly improves the corrosion resistance of stainless steel and is suitable for various models. Stainless steel parts, plates and equipment. It is simple to operate, easy to use, economical and practical. At the same time, it is added with high-efficiency corrosion inhibitors and fog inhibitors to prevent metal corrosion, hydrogen embrittlement, and acid fog. It is suitable for small and complex workpieces, and is not suitable for pasting. It is superior to similar products in the market.

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