1. The cleaning of straight seam steel pipes typically involves the use of solvents and emulsions to remove oil, grease, dust, lubricants, and other organic contaminants from the steel surface. However, this method is ineffective against rust, oxide scale, or welding flux. It is primarily used as a supplementary step in the production process rather than a standalone cleaning method.
2. For rust removal on straight seam steel pipes, tools such as wire brushes are commonly used. These tools can effectively remove loose scale, rust, and welding slag from the steel surface. Manual brushing can achieve a cleanliness level of Sa2, while power tools can reach up to Sa3. However, if the steel surface has a thick layer of iron oxide scale, the effectiveness of mechanical rust removal may be limited. In such cases, the required depth for anchoring lines in anti-corrosion coatings might not be achieved, which could affect the long-term performance of the coating.
3. Pickling of straight seam steel pipes is usually carried out through chemical or electrolytic processes. Among these, chemical pickling is the most common method. It is effective in removing scale, rust, and old paint layers, and can serve as an alternative to sandblasting in some cases. While chemical cleaning can improve surface cleanliness and roughness, the resulting anchorage is relatively shallow. Additionally, this method can lead to environmental pollution if not properly managed, making it important to follow safety and disposal guidelines carefully.
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