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Stainless steel welded pipes are favored by various industries because of their high-temperature resistance and corrosion resistance, and stainless steel products can be seen everywhere in people's lives. Therefore, you should learn more about stainless steel in order to make better use of stainless steel products and stainless steel welded pipes. What should we do if the stainless steel welded pipe is improperly used and produces rust?
1. Derusting level, for the construction process of epoxy, ethylene, phenolic, and other anti-corrosion coatings commonly used in stainless steel welded pipes, the general requirement is to make the surface of the alloy pipe nearly white. This rust removal grade can remove almost all the oxide scale, rust, and other dirt, which fully meets the adhesion requirements of the anti-corrosion layer and the alloy pipe, and the spray rust removal process can be stable and reliable at a lower cost. The conditions that make the quality reach the near-white level.
2. In order to achieve the desired rust removal effect, it is necessary to select abrasives, single-layer epoxy, two-layer, or three-layer according to the hardness of the stainless steel welded pipe surface, the degree of original rust, the required surface roughness, and the type of coating. Polyethylene coating, in order to achieve the ideal rust removal effect, it is necessary to use a mixed abrasive of steel grit and steel shot. Because the steel shot has the effect of strengthening the steel surface, and the steel grit has the effect of etching the steel surface.
3. In order to obtain better uniform cleanliness and roughness distribution, the design of the particle size and ratio of the abrasive is very important, because the roughness is too large, it is easy to cause the anti-corrosion layer to become thinner at the peak of the anchor pattern, At the same time, because the anchor pattern is too deep, it is easy to form bubbles in the process of anti-corrosion, which seriously affects the performance of the anti-corrosion layer.
4. Before the spray treatment, remove the grease and fouling on the surface of the stainless steel welded pipe, and also use a heating furnace to preheat the pipe body to 40-60 degrees Celsius to keep the surface of the alloy pipe in a dry state because the surface of the alloy pipe does not contain grease and other dirt, which can enhance the effect of rust removal. In addition, the dry surface of the alloy pipe is also conducive to the separation of steel shot, steel grit, rust and oxide scale, which will make the surface of the alloy pipe after rust removal more of a cleanliness.
Hope this content is helpful to you, Dingshang is a professional welded stainless steel pipe manufacturer, if you are interested in the product, please contact us.