The rust phenomenon of 304 stainless steel belt material may have the following reasons:
1: Chloride ions exist in the use environment.
Chloride ions exist widely, such as salt/sweat/seawater/sea breeze/soil and so on. In the presence of chloride ions, stainless steel corrodes rapidly, even more than ordinary low carbon steel.
2: No solution treatment.
The alloying elements are not dissolved into the matrix, resulting in low alloy content in the matrix structure and poor corrosion resistance.
3: This material without titanium and niobium has an inherent tendency to intergranular corrosion.
The addition of titanium and niobium, together with stabilization treatment, can reduce intergranular corrosion.
304 is a general-purpose stainless steel, which is widely used to make equipment and parts that require good comprehensive properties (corrosion resistance and formability).
304 stainless steel is a grade of stainless steel produced according to the American ASTM standard. 304 is equivalent to my country's 0Cr19Ni9 (0Cr18Ni9) stainless steel. 304 contains 19% chromium and 9% nickel.
304 is the most widely used stainless/heat resistant steel. For food production equipment / Xitong chemical equipment / nuclear energy, etc.:
304 The corresponding Chinese grades are 0Cr18Ni9, 1Cr18Ni9Ti, carbon content ≤ 0:08%
The reasons for the rusting of 304 stainless steel belts are introduced here.