3pe corrosion spiral price, 3pe corrosion spiral quotes, 3pe antiseptic factory 3pe corrosion spiral price spiral, 3pe corrosion spiral quotes, 3pe antiseptic factory 3pe corrosion spiral price spiral, 3pe corrosion spiral quotes, 3pe corrosion spiral plants are usually metal surfaces will be accompanied by dust, grease, scale, corrosion layer, pollutants, salt or loose old paint. Oxide which is relatively common but the most easily overlooked part. Oxide is a layer of dense oxide layer formed during the steel produced by hot forging, usually attached to relatively strong, but compared to steel itself is brittle, and its own cathode, will accelerate metal corrosion. If you do not remove these substances, direct painting, is bound to affect the entire coating adhesion and corrosion resistance. According to statistics, about 70 percent more than the paint problem is due to improper surface treatment caused. Therefore, the performance reflects a metal anti-corrosion coating paint system suitable surface treatment is essential. That level of cleanliness cleanup, representative of international standards, there are two: one is the United States 85 years to develop "SSPC-", the second is 76 years in Sweden developed "Sa-", which is divided into four grades were Sa1 , Sa2, Sa2.5, Sa3, customary international common standards, as detailed below: Sa1 level - the equivalent of US SSPC-SP7 class. Using the general simple manual brushing, emery cloth grinding method, which is the lowest of the four cleanliness moderate level of protection of the coating is only slightly better than the workpiece processing is not employed. Sa1 level processing technology standards: the surface should not be visible oil, grease, residual oxide, rust, and paint residues and other contaminants. Sa1 level also called manual brushing clean-level (or cleaning level). Sa2 level - the equivalent of US SSPC-SP6 class. Using blast cleaning method, which is the lowest level of sandblasting, that general requirement, but for protection than manual brushing coating to improve the lot of cleanup. Sa2 level technical standard treatment: the surface should not be visible greasy, dirt, scale, rust scale, paint, oxides, corrosion, and other foreign matter (except for defects), but the defect is limited to no more than per square meter surface 33%, which may include a slight shadow; because a small amount of mild decolorization defects, corrosion caused; scale and paint defects. If the original surface of the workpiece dents, rust and paint the minor will be left in the bottom of the dent. Sa2 grade, also known as commodity cleanup level (or industrial). Sa2.5 level - is commonly used in the industry and can be used as the acceptance level of technical requirements and standards. Sa2.5 level also called near white cleanup level (near white or a white level). Sa2.5 level technical standard treatment: the first half with Sa2 require the same, but the defect is limited to no more than 5% per square meter surface, which may include a slight shadow; because a small amount of mild decolorization defects, corrosion caused; scale and paint defects . Sa3 level - level equivalent to the US SSPC-SP5 level, is the highest level of industrially processed, also called white cleanup level (or white level). Sa3 level processing technology standards: the Sa2.5 level the same, but 5% of the shadows, defects, corrosion and other defects not exist. [2] With the development of modern industry, a number of the emergence of new industries and the construction of many modern works on anti-corrosion coating capacity of the environment and life put forward higher requirements. Commonly used anti-corrosion coatings can not meet these needs. It's "heavy-duty coatings (Heavy-duty Coating)" concept, generally refers to corrosion in harsh environments, including primer and topcoat paint matching. Simply put: heavy-duty coatings is longer life, can adapt to a more demanding environment of paint called heavy duty coatings. Heavy-duty coatings in the chemical atmosphere and ocean environments generally use more than 10 or 15 years, in acid, alkali, salt and solvent medium, the corrosion conditions and under a certain temperature, generally more than 5 years. 3pe corrosion spiral price, 3pe corrosion spiral quotes, 3pe corrosion spiral plant