Jan 15, 2021
After spraying (throwing) to remove rust,Seamless pipe it can not only expand the physical adsorption of the pipe surface, but also enhance the mechanical adhesion of the anti-corrosion layer to the pipe surface. Therefore,Seamless pipe spray (throwing) rust removal is an ideal way to remove rust from pipelines. Generally speaking,Seamless pipe shot blasting (sand) rust removal is mainly used for pipe inner surface treatment,Seamless pipe and shot blasting (sand) rust removal is mainly used for pipe outer surface treatment. Several problems should be paid attention to when using spray (throwing) to remove rust.
Rust removal grade: For the construction process of epoxy, ethylene,Seamless pipe phenolic and other anticorrosive coatings commonly used for steel pipes,Seamless pipe the surface of the steel pipe is generally required to be nearly white. Practice has proved that the use of this rust removal level can remove almost all oxide scale, rust and other dirt,Seamless pipe and the depth of the anchor pattern reaches 40-100μm,Seamless pipe which fully meets the requirements of the adhesion of the anti-corrosion layer and the steel pipe. The rust process can achieve near-white technical conditions with low operating costs and stable and reliable quality.
Spray (throwing) abrasive: In order to achieve the ideal rust removal effect,Seamless pipe the abrasive should be selected according to the hardness of the steel pipe surface,Seamless pipe the degree of original corrosion, the required surface roughness, the type of coating, etc. For single-layer epoxy,Seamless pipe two-layer or three-layer Layered polyethylene coating, using a mixed abrasive of steel grit and steel shot,Seamless pipe it is easier to achieve the ideal rust removal effect. Steel shot has the effect of strengthening the steel surface (role),Seamless pipe while steel grit has the effect of etching the steel surface. Mixed abrasives of steel grit and steel shot (usually the hardness of steel shot is 40-50 HRC, and the hardness of steel grit is 50-60 HRC. It can be used on various steel surfaces, even on C-grade and D-grade rusted steel surfaces ,Seamless pipe The rust removal effect is also very good.
Jan 20, 2021