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What is the core anti rust element of stainless steel strip
source：www.cnlichao.net | Release time：2026年01月13日1. The core rust prevention mechanism of chromium
When the chromium content in stainless steel strip is ≥ 10.5%, chromium will react with oxygen in air or corrosive media, forming a dense, stable, and strongly adhered chromium oxide passivation film on the material surface. This thin film can isolate corrosive media such as water, oxygen, acid and alkali from the outside and prevent the internal metal from being oxidized and corroded. The higher the chromium content, the stronger the protective performance of the passivation film and the better the rust prevention effect.
2. Strengthening effect of auxiliary anti rust elements
Nickel (Ni): synergistically with chromium, it can optimize the passivation film structure, improve the corrosion resistance and oxidation resistance of stainless steel strips, and enhance the toughness and ductility of materials (such as 304 and 316 austenitic stainless steel strips).
Molybdenum (Mo): significantly improves the pitting and crevice corrosion resistance of stainless steel strips, especially suitable for strong corrosive environments such as seawater, acid and alkali. For example, 316 stainless steel strip has much better rust resistance than 304 stainless steel strip due to the addition of molybdenum element.
Titanium (Ti) and niobium (Nb): can prevent intergranular corrosion of stainless steel strips during welding, stabilize the anti rust performance of materials, and are suitable for industrial applications under welding conditions (such as 321 stainless steel strips).
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