What should be paid attention to in the production of stainless steel hollow spheres?
common problems: weld defects: the weld defects are serious, and the manual mechanical grinding method is used to make up for the grinding marks, resulting in uneven surface and affecting the appearance. Inconsistent surface: only pickling and passivating the weld seam will also cause uneven surface and affect the appearance. Scratches are difficult to remove: the whole pickling and passivation cannot remove all kinds of scratches generated in the processing process, and impurities such as carbon steel and splash adhered to stainless steel surface due to scratches and welding splash cannot be removed, lead to chemical corrosion or electrochemical corrosion and rust in the presence of corrosive medium.
stainless steel hollow ball grinding, polishing and passivation are uneven: pickling and passivation treatment is carried out after manual polishing and polishing, and it is difficult to achieve uniform and consistent treatment effect for workpieces with large area, can not get the ideal uniform surface. And the cost of working hours and accessories is also high. Stainless steel hollow sphere has limited pickling capacity: pickling passivation paste is not universal, and it is difficult to remove black oxide scale produced by plasma cutting and flame cutting. Scratches caused by human factors are more serious: During hoisting, transportation and structural processing, scratches caused by human factors such as bumping, dragging and hammering are more serious, making surface treatment more difficult, it is also the main cause of corrosion after treatment.
Equipment factors: scratches and creases caused during bending and bending of profiles and plates are also the main causes of corrosion after treatment. Other factors: in the process of purchasing and storing stainless steel raw materials, bumps and scratches caused by hoisting and transportation are also serious, which is also one of the causes of corrosion.
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