The corrosion of stainless steel pipe mainly occurs in the whole contact with the media environment, which is characterized by uniform thinning along the section. Most of the corrosion occurs in the acid and hot alkali media environment. The overall corrosion resistance of stainless steel is often judged by corrosion rate (mm/a).
Reasons for corrosion of stainless steel pipes
Lead by causes of corrosion of stainless steel pipe is not the formation of passivating film, passivation film instability or passivation membrane damage and can not timely repair of the three; in practice, in many corrosion environment, the stainless steel pipe surface passivation film even intact, often dissolved in different speed until the control equipment, stainless steel; component, container thickness (or section) gradually thinning and failure.
Measures to prevent corrosion of stainless steel pipes
According to the type, concentration, temperature and other requirements of corrosion medium, the grade of corrosion resistance should be chosen. Then select suitable stainless steel grade according to the requirements of corrosion resistance grade.
The corrosion resistance of stainless steel pipes is evaluated by the corrosion rate of the stainless steel pipe under the condition of full corrosion. In this medium, the corrosion rate of stainless steel pipes is corrosion resistant in the allowable range, but this is not corrosion.
Because there are a lot of stainless steel pipe corrosion corrosion Handbook for reference, and the test data of stainless steel in a large number of practical medium for use, and there are a lot of practical engineering experience using stainless steel pipe, so as long as the correct selection and reasonable use of stainless steel, it can avoid the general corrosion of stainless steel. Generally speaking, in the practical application, because the corrosion resistance of the stainless steel pipe to advance in the medium, the corrosion rate of stainless steel pipe, master the equipment under the reasonable use of the service life.
Source: China Stainless Steel Pipe Manufacturer – Yaang Pipe Industry Co., Limited (www.yaang.com)