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304 stainless steel angle rust what are the reasons

Time:2022-03-28 Source:Wuxi Jianuo Special Steel Co., Ltd.

304 stainless steel angle rust what are the reasons

304 stainless steel angle is a common application of stainless steel plate. Wear-resistant steel. Used for food production equipment. Xitong chemical machinery and equipment. Nuclear energy generation, etc. The principle of rustproof treatment of stainless steel plate is that the aluminum alloy element produces a tight air oxide film, which protects against oxygen touching and avoids further air oxidation. Therefore, stainless steel plate is not “stainless steel plate”. Stainless steel plate will rust, which may be triggered by the following factors.


1. chloride ion content exists in the application conditions

Chlorine ion content is commonly present, such as salt. Sweat. Sea surface. Cool sea breeze. Soil layer, etc. Stainless steel plate in the chloride ion content there can be leached quickly.

Therefore, the application conditions of 304 stainless steel angle has provisions, must often scrub to remove dust, keep clean and dry.

2. No aqueous solution treatment

304 stainless steel angle aluminum alloy element does not dissolve the base material, resulting in low aluminum alloy composition, the base material corrosion resistance is poor.

3. This kind of material without titanium and niobium has a natural tendency to stress corrosion, to add titanium and niobium and carry out anti-aging treatment, can reduce stress corrosion.

The product is a ferritic stainless steel, can resist the leaching in the gas or chemically corrosive substances. Stainless steel plate is a kind of surface beautiful and generous. Good corrosion resistance of steel, without electroplating process and other surface treatment, but played the original appearance of stainless steel plate characteristics, the main use of universal, generally called stainless steel plate. Typical performance indicators are ferritic stainless steel, such as 13 manganese steel and 18-8 chromium-molybdenum alloy steel.

From the direction of view, because 304 stainless steel angle with chromium, so the surface layer produced a very thin layer of chromium film, to be able to separate the effectiveness of the resistance to oxygen leaching. In order to better ensure the original corrosion resistance of stainless steel plate, the steel shall carry more than 0.12 of chromium.