介绍了一种201、304不锈钢通用发黑工艺.研究了着色液各组分和挂具的材质对黑色膜性能的影响.着色的最佳配方与工艺为:CrO3 165g/L,H2SO4310mL/L,H3PO4 60mL/L,添加剂A(铵盐)60g/L,添加剂B(过渡金属元素的硫酸盐)143g/L,着色温度91～95℃,着色时间20～25 min,以304不锈钢丝作挂具.在最佳配方与工艺条件下,201、304不锈钢黑板的膜层均匀、黑亮,耐蚀性能均优于对应的基体,耐磨擦性能优越.
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