1. The machining, especially welding, will cause welding defect and damage to stainless steel. It is necessary to carry out pickling, passivation and polishing to achieve a neat and beautiful appearance.
2. The stainless steel machined may contain some defects, like air holes, fissures, slag, and even localized corrosion or cracks. It is mechanical finishing and chemical treatment that can improve the corrosion resistance and make the steel durable.
3. The stainless steel equipment ought to be finished and cleaned to prevent contamination and guarantee product quality, if they are used in pharmaceutical, food, nuclear and other industries.

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