site logo

304 stainless steel belt how to maintain

304 stainless steel belt how to maintain

Time:2022-04-02 Source:Wuxi Jianuo Special Steel Co., Ltd.

A. 304 stainless steel coil with

1.304-universal model; that is, 18/8 stainless steel. GB grade 0Cr18Ni9. 304 type widely used materials. Corrosion resistance, heat resistance, good mechanical properties, deep stamping, bending and other normal temperature processing performance, heat treatment will not harden, in the building can withstand general rust, can resist food processing media leaching (but contains concentrated acid and chloride components of the high temperature state may appear corrosion), can resist organic compounds, dyes and a wide variety of inorganic compounds.

2.304L type (low carbon), good resistance to nitric acid, and durable medium temperature and concentration of sulfuric acid, widely used as liquid gas storage tanks, used as low temperature equipment (304N), appliances other consumer products, kitchen equipment, hospital equipment, transportation, wastewater treatment devices.

008 (2)

3. In the air or chemically corrosive media can resist corrosion of a high-alloy steel, with beautiful surface and good corrosion resistance, without the need for surface treatment such as color plating, and play the inherent surface properties, the use of a variety of steel, commonly known as stainless steel. The representative performance of 13 chromium steel, 18-chromium-nickel steel and other high-alloy steel.

4. From the metallographic point of view, because stainless steel contains chromium and makes the surface form a very thin chromium film, this film separates the oxygen invaded with the steel to play a role in corrosion resistance. In order to maintain the inherent corrosion resistance of stainless steel, the steel must contain more than 12% chromium.

II. Mirror stainless steel belt how to maintain?

① surface natural whitening treatment; ② surface mirror bright treatment; ③ surface coloring treatment.

1. Surface natural whitening treatment: stainless steel in the processing process, after the rolled plate, tied edge, welding or after artificial surface fire baking heating treatment, resulting in black oxide skin. This hard gray-black oxide skin is mainly NiCr2O4 and NiF two EO4 components, before the general use of hydrofluoric acid and nitric acid for strong corrosion method to remove. But this method is costly, polluted environment, harmful to human body and corrosive, and gradually eliminated.

At present, there are two main treatment methods for oxide skin.

(1) sandblasting (pill) method: mainly using the method of spraying micro glass beads to remove the black oxide skin on the surface.

(2) Chemical method: the use of a non-polluting pickling passivation paste and room temperature non-toxic cleaning solution with inorganic additives for dipping. Thus achieving the purpose of whitening treatment of stainless steel natural color. After the treatment basically looks like a color of no light. This method is more applicable to large, complex products.

2 stainless steel surface mirror bright treatment method: according to the complexity of stainless steel products and different user requirements can be used respectively mechanical polishing, chemical polishing, electrochemical polishing and other methods to achieve a mirror luster.

3 surface coloring treatment: stainless steel coloring not only gives stainless steel products a variety of colors, increasing the variety of products, but also to improve product wear resistance and corrosion resistance.