How to remove rust of GBT 8162 42CrMo seamless pipes

One of the most important problems encountered in the use of GBT 8162 42CrMo seamless pipes is the problem of rust. Once rusty, many characteristics of 42CrMo seamless pipes can not be brought into play. So we need to prevent 42CrMo steel pipe from rust, and also master some methods to remove rust.   

1. Cleaning to remove rust of GBT 8162 42CrMo seamless pipes
The solvent and emulsion are used to clean the surface of GBT 8162 42CrMo seamless pipes and to remove oil, grease, dust, lubricant and similar organic matters.  The method can not remove rust, oxide skin and flux on surface of 42CrMo seamless pipes, so it is only an auxiliary means in the anticorrosion production.

2. Tool rust removal
The GBT 8162 42CrMo seamless pipe surface is polished with steel brush and other tools to remove loose or tilted oxide scales, rust and slag. Manual tool rust removal can reach Sa2 level, power tool rust removal can reach Sa3 level. If the 42CrMo steel pipe surface is attached to solid oxide skin, the tool rust removal effect is not ideal, and can not reach the anticorrosion construction requirements for the anchor depth.

3. Pickling to remove rust of GBT 8162 42CrMo seamless pipes
In general, two methods of chemical and electrolysis are used to do acid cleaning. Only chemical acid washing is used in pipeline anticorrosion, which can remove oxide skin, rust and old coating. Sometimes it can be used as the reprocessing after sand blasting. Although chemical cleaning can make the surface of GBT 8162 42CrMo seamless pipes reach a certain degree of cleanliness and roughness, its anchor grain is shallow, and it is easy to pollute the environment.

4. Sand blasting to remove rust of GBT 8162 42CrMo seamless pipes
Sand blasting can not only completely remove surface rust, oxide and dirt of GBT 8162 42CrMo seamless pipes, but also can achieve the uniform roughness under the abrasive impact and friction force.

The above are some methods of rust removing of GBT 8162 42CrMo seamless pipes. Once rusty, the effect of 42CrMo seamless pipes will be greatly reduced! You may combine the methods with your situation to make right choice.