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Several Methods of Derusting Ordinary Carbon Steel Seamless Pipe
Jun 16, 2020
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Ordinary carbon steel seamless steel tube is basically not corrosion-resistant. If it is placed outdoors or in a humid environment without a good storage site, the carbon steel will rust. Then, at this time, it requires rust removal.
Here are several methods of derusting ordinary carbon steel seamless pipe.
I: Acid pickling
Generally, chemical and electrolytic methods are used for pickling treatment. Chemical pickling is only used for pipeline corrosion protection, 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 reach a certain degree of cleanliness and roughness, its anchor pattern is shallow and it is easy to pollute the environment.
II. Cleaning
Solvent and emulsion are used to clean the steel surface to remove oil, grease, dust, lubricant and similar organic matters. However, it can not remove rust, oxide skin and welding flux on the steel surface. So it is only used as an auxiliary means in anti-corrosion production.
III. Tool rust removal
It mainly is used by steel wire brush and other tools to polish the steel surface, which can remove loose or raised oxid skin, rust, welding slag, etc. The derusting effect of hand tools and power tools for cold drawn seamless steel pipes can reach SA2 and SA3 respectively. If the steel surface adheres to solid oxide scale, the derusting effect of tools is not ideal and the depth of anchor pattern required by anti-corrosion construction cannot be reached
IV. Rust removal by spraying (throwing)
Rust removal by spraying (throwing) is a high-speed rotation of the spraying (throwing) blade driven by a high-power motor, which enables abrasive such as steel sand, steel shot, iron wire section and minerals to spray (throwing) on the surface of the steel pipe under the centrifugal force. This method can not only clean the rust, oxide and dirt completely, but also the teel pipe can achieve the required uniform roughness under the strong impact and friction of abrasive Degree.
After spraying (throwing) and removing rust, on one hand, the physical adsorption on the pipe surface can be expanded, on the other hand, the mechanical adhesion between the anticorrosive coating and the pipe surface can be enhanced. Therefore, it is necessary to spray (throw) and spray to remove rust.
Here are several methods of derusting ordinary carbon steel seamless pipe.
I: Acid pickling
Generally, chemical and electrolytic methods are used for pickling treatment. Chemical pickling is only used for pipeline corrosion protection, 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 reach a certain degree of cleanliness and roughness, its anchor pattern is shallow and it is easy to pollute the environment.
II. Cleaning
Solvent and emulsion are used to clean the steel surface to remove oil, grease, dust, lubricant and similar organic matters. However, it can not remove rust, oxide skin and welding flux on the steel surface. So it is only used as an auxiliary means in anti-corrosion production.
III. Tool rust removal
It mainly is used by steel wire brush and other tools to polish the steel surface, which can remove loose or raised oxid skin, rust, welding slag, etc. The derusting effect of hand tools and power tools for cold drawn seamless steel pipes can reach SA2 and SA3 respectively. If the steel surface adheres to solid oxide scale, the derusting effect of tools is not ideal and the depth of anchor pattern required by anti-corrosion construction cannot be reached
IV. Rust removal by spraying (throwing)
Rust removal by spraying (throwing) is a high-speed rotation of the spraying (throwing) blade driven by a high-power motor, which enables abrasive such as steel sand, steel shot, iron wire section and minerals to spray (throwing) on the surface of the steel pipe under the centrifugal force. This method can not only clean the rust, oxide and dirt completely, but also the teel pipe can achieve the required uniform roughness under the strong impact and friction of abrasive Degree.
After spraying (throwing) and removing rust, on one hand, the physical adsorption on the pipe surface can be expanded, on the other hand, the mechanical adhesion between the anticorrosive coating and the pipe surface can be enhanced. Therefore, it is necessary to spray (throw) and spray to remove rust.
