Galvanized steel pipe? After derusting, it can not only enlarge the physical adsorption of the pipe surface, but also enhance the mechanical adhesion of the anticorrosion layer and the pipe surface. Therefore, the galvanized steel strip rust is the ideal way to rust the pipeline anticorrosion. Generally speaking, the blast (sand) derusting is mainly used in pipe surface treatment, blasting (sand) derusting is mainly used for pipe surface treatment. Several problems should be noticed in the use of spray (throwing) rust.
Galvanized sheet Rust Grade
For steel tubes commonly used in epoxy, ethylene, phenolic and other anti-corrosion coatings, the general requirements of the surface of the steel pipe to reach the near-white. Practice proves that the use of this kind of galvanized plate rust grade can almost remove all the oxidation skin, rust and other dirt, anchor depth reaches 40~100 μ m, fully meets the anti-corrosion layer and the steel pipe adhesion requirements, while spraying (throwing) The spray rust process can be lower operating costs and stable and reliable quality to reach the near-white (Sa2.5) technical conditions.
Galvanized Steel Sheet Abrasive
In order to achieve the desired rust removal effect, according to the hardness of the steel pipe surface, the degree of original rust, the requirements of surface roughness, coating type to select abrasives, for single-layer epoxy, two-layer or three-layer polyethylene coatings, using galvanized steel sand and steel pills mixed abrasives more easily to achieve the desired rust effect. Steel pill has the effect of reinforcing steel surface, while steel sand has the effect of etching steel surface. Steel grit and steel pill mixed abrasives (usually steel pill hardness for 40~50 HRC, steel grit hardness for 50~60 HRC can be used for all kinds of steel surfaces, even if it is used in the C-and D-level corroded steel surfaces, derusting effect is also very good.)