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　　[1] Cleaning: Solvents and emulsifiers are used to clean the surface of high-pressure boiler pipe to remove oil, grease, dust, lubricants and similar organic matter, but it can not remove rust, oxide scale, welding flux on the surface of high-pressure boiler pipe, so it is only used as an auxiliary means in anti-corrosion production.

　　[2] Tool derusting: The surface of  ASTM A406 Grade B Seamless Steel Boiler Pipe can be polished by steel brush and other tools, which can remove loose or warped oxide scale, rust, welding slag and so on. Manual tools can remove rust up to Sa2 level, power tools can remove rust up to Sa3 level. If the surface of high-pressure boiler pipe is adhered to a solid oxide sheet, the effect of tool rust removal is not ideal, and the depth of anchor lines required by anticorrosion construction can not be reached.

　　[3] Pickling: Chemical and electrolytic methods are generally boiler pipe used for pickling treatment. Boiler pipe corrosion protection only uses chemical pickling, which can remove oxide scales, rust, old coatings, and sometimes can be used as re-treatment after sandblasting and rust removal. Although boiler pipe chemical cleaning can achieve a certain degree of cleanliness and roughness of the surface, its anchor lines are shallow and easy to pollute the environment.

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