After the surface of stainless steel equipment is ground, the grinding marks remain even after pickling; how to deal with this?
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There were similar problems before; grinding followed by pickling and passivation was used, but the traces of grinding remained after pickling, affecting the appearance. Finally, water jet sandblasting is applied. However, after sandblasting, the surface of stainless steel becomes dull in color and differs from its original color. How does everyone deal with this issue? How can surface defects be repaired so that the color of the surface remains roughly the same after pickling and passivation?
To address the issue of residual marks remaining after acid washing and passivation following the grinding of stainless steel surfaces, if color inconsistency occurs after water jet sandblasting was used previously, microbead sandblasting can be considered. Bead blasting can treat the surface more gently while preserving the natural color of stainless steel. After sandblasting, thorough acid washing and passivation are carried out again to ensure a smooth surface and uniform color. If problems still exist, it may be necessary to reconsider the particle size and parameters of grinding and sandblasting to find the optimal treatment combination. .
Polish with a millstone impeller; if the defect is deep, fill it with metal powder