1. The processed components and finished products should be accepted by the resume before surface treatment can be carried out.
2. The burrs, welding coatings, weld bumps, spatters, dust and scales on the surface of welded steel pipes should be cleaned before rust removal. At the same time, the fluffy oxide scale and thick rust layer should be removed.
3. If there is oil and grease on the surface of the welded steel pipe, it should be removed and cleaned before rust removal. If there are oil stains and grease on only one area, one-sided disposal methods can be used at ordinary times; if there are large areas or all areas, solvents or hot alkali can be used for cleaning.
4. When there is acid, alkali or salt on the surface of the welded steel pipe, you can choose to wash it off with hot water or steam. However, attention should be paid to the disposal of waste water, so as not to cause environmental pollution.
5. Some newly rolled stainless steel pipes are painted with maintenance paint in order to avoid corrosion during storage and transportation in the short term. The stainless steel pipes coated with maintenance paint should be disposed of according to the specific environment. If the maintenance paint is a two-component paint cured by a curing agent, and the coating is basically intact, it can be treated with emery cloth, stainless steel tube velvet or mild eruption, and after the dust is cleaned up, the next process can be carried out.
6. For the surface of welded steel pipes, paint shop primer or the usual primer for maintenance, and usually choose the disposal method according to the current status of the coating and the next matching paint. Anything that cannot be further painted or affects the adhesion of the next coating should be removed.
