OCTG Casing & Well Casing corrosion treatment methods:
Physical methods:
1. Mechanical grinding
Mechanical grinding is a common treatment method for casing corrosion. This can be done using angle grinders, grinders and other tools. It should be noted that the grinding intensity must be controlled during the operation to avoid excessive grinding, which may lead to more serious corrosion.
2. Sandblasting
Sandblasting is also a common treatment method. Quartz sand or other abrasives are sprayed under high pressure to remove the rust layer and old paint layer to achieve the effect of cleaning the surface and enhancing adhesion. When using a sandblasting machine, you need to pay attention to protective measures to avoid abrasives causing harm to people and equipment.
Chemical methods:
1. Pickling
Pickling can quickly remove rust on the surface of the casing and restore its brightness. Before pickling, solvents must be used to remove grease and other dirt to avoid interfering with the pickling effect. During pickling, attention should be paid to controlling the concentration and temperature of the acid to ensure safe operation. At the same time, waste acid also needs to be properly disposed of to avoid environmental pollution.
2. Electrochemical treatment
Electrochemical treatment is a treatment method that reduces oxides on the metal surface and reduces metal ions into metal atoms under the action of an electric field or current. It has the advantages of fast speed, good effect and environmental protection. However, it is necessary to control the current intensity and processing time to avoid carving the rusted area too deeply.
Precaution:
In addition to the above methods, it is also necessary to prevent the occurrence of casing corrosion. Common measures to prevent rust include:
1. Moisture-proof
Casings are susceptible to moisture, which can lead to rust. Therefore, moisture-proof measures need to be added during storage and use.
2. Anti-rust
The casing can be protected by coating, such as painting, chrome plating, etc.
3. Paint regularly
Regular maintenance and painting can effectively prevent casing corrosion.
In summary, casing corrosion can be treated by mechanical grinding, sandblasting, pickling, electrochemical treatment and other methods. At the same time, preventive measures need to be taken, such as moisture-proof, rust-proof, regular painting, etc., to avoid the occurrence of rust.
Read more: What are the Grades of OCTG Casing Material?
