There are three major causes of oxidation of the welded pipe:
1, The production process reasons: This is one of the reasons lead to oxidation of steel products, from the production process and product characteristics, the product surface to form a thin oxide film is to avoid the oxidation of the underlying process, but also steel products different from other steel products, one of the main features, but by welded pipe production process inadequate or inadvertently led to the performance of the oxide film is not complete, not continuous, the oxygen in the air will be directly with the product of some elements of the redox reaction, resulting in the performance of the product appear oxidation phenomenon.
2, The product ingredients ratio reasons: Some manufacturers in order to reduce production costs, thereby reducing some such as chromium, nickel and other important elements of the proportion of content, while increasing other elements such as carbon content, this is not strictly in accordance with the product model, product features. For example, if the content of chromium in 304 stainless steel pipe is insufficient, it will not only affect the corrosion resistance and formability of welded pipe, but also be used in chemical industry, equipment and production industry. There are potential product quality and safety risks; the same time, also affect the appearance of the product and anti-oxidation properties.
3, Man-made reasons: This is also one of the most commonly encountered products of some consumers in the use of stainless steel oxidation products, some consumers in the use and maintenance of improper operation, in particular, some of the welded pipe for the food and chemical equipment industry pipe products. There is a high probability of anthropogenic oxidation. For artificially produced weld pipe oxidation, it is necessary to have correct knowledge of product usage and to regularly and reasonably maintain and maintain it, so as to reduce oxidation caused by improper use by man.
