Precision casting manufacturers introduce the corrosion resistance of stainless steel castings

- Apr 19, 2019-

The corrosion resistance of stainless steel depends on chromium, but since chromium is one of the components of steel, the maintenance methods are not the same.


    When the increase in chromium reaches 10.5%, the atmospheric corrosion resistance of the steel is significantly increased, but when the chromium content is higher, although the corrosion resistance can still proceed, it is not significant. The reason is that when the steel is alloyed with chromium, the type of the outer oxide is changed to resemble the outer oxide composed of pure chromium metal. This tightly adhering chromium-rich oxide maintains its appearance and avoids further oxidation. This oxide layer is extremely thin, through which it can see the natural luster of the steel surface, so that the stainless steel has a similar appearance. Moreover, assuming that the surface layer is damaged, the exposed steel surface will self-repair with the atmospheric response, and the oxide "passivation film" is formed from the beginning to continue the maintenance function.


    Therefore, all the stainless steel elements have a characteristic that the chromium content is above 10.5%.


    What are the advantages of fine casting?


    1. The casting specification has high precision, the general linear tolerance is 1%, the visual point tolerance is ± 1/2 degree, and the appearance finish can reach Ra 1.6-3.2, which can save data and machining costs.


    2, can produce messy parts, or cast multiple parts into one, eliminating the need for assembly or welding operations.


    3, able to cast delicate text or LOGO images on the exterior of the product, and march the product image.


    4, casting data has a wide range of functions, heat resistance, wear resistance, corrosion resistance, data hardness up to HRC15-60, to meet the needs of various working conditions.


    5, casting production batch. Quantity active, from small to large batch production, high efficiency, good repeatability; low mold costs, low initial investment in product development.