As far as the rust-proof steel ball is concerned, its biggest feature is that it has good rust-proof performance and is not easy to rust. This is because the raw material of the rust-proof steel ball contains chromium. Chromium plays an important role in the rust prevention of austenitic stainless steel, so chromium is an important alloying element in stainless steel. The rust and corrosion resistance of austenitic stainless steel is mainly due to the chrome under the action of the chrome. It promotes the passivation of steel and maintains the steel in a stable and passive state.
By the addition of chrome, a layer of dense chrome oxide layer is formed on the surface of the steel, which can effectively block the re-contact of the steel and the air, so that the oxygen in the air cannot enter the steel, thereby preventing the rust of the steel. . When the chromium content in the steel exceeds 12%, the stainless steel can resist chemical damage.
Therefore, when choosing a rust-proof steel ball, you need to pay attention to the stainless steel ball material. The chrome content of different stainless steel materials is different. For example, 316 stainless steel has a relatively high chromium content, so the rust resistance of 316 stainless steel is better than that of 420 and 440c.