Coating technology: establishment and basis of performance index of heavy-duty anticorrosive coating

Core tips: Determination of index items: The main indexes of the products specified in this standard are the appearance, viscosity, fineness, surface dry time, dry time, impact strength, flexibility, adhesion, covering power, hardness of the paint film, and thirteen performance indexes to ensure the solid content of the project to be acid, alkali and salt resistant The indexes of water resistance, gasoline and aviation kerosene are specified in the special anti-corrosion coating for the inner wall of drinking water container, which is the basis for evaluating the three products Provisions and basis of main project indicators 1 appearance of paint film: Coating appearance color, light, semi light, no light, etc Paint knowledge how about Akzo Nobel Powder Coating Recommended introduction: powder coating is a kind of coating with different form from general coating, which is in powder form It is a new type of coating, because of its own advantages and more and more known by people Let's introduce Akzo Nobel Powder coating Akzo Nobel Powder coating is a cost-effective coating solution, which can be applied to different kinds of products After the treatment of static electricity and fire baking, a tough and durable coating surface will be formed, with the least impact on the environment Since the introduction of this technology, powder coating has been able to continue to maintain the Home of coatings: Determination of index items: the main indexes of the products specified in this standard are the appearance, viscosity, fineness, surface dry time, dry time, impact strength, flexibility, adhesion, covering power, hardness of the paint film, and 13 performance indexes to ensure the acid, alkali and salt resistance of the solid content of the project The indexes of water resistance, gasoline and aviation kerosene are specified in the special anti-corrosion coating for the inner wall of drinking water container, which is the basis for evaluating the three products Specification and basis of main project index 1 paint film appearance: paint appearance color, light, half light, no light, etc Viscosity: too high viscosity is not easy to construct, cost increases, too thin is easy to hang, film thickness is not enough to affect the anti-corrosion effect According to the standard GB / t1723-93, the detection time is 80 ~ 120s 3 fineness: too fine to coarse affects adhesion and anti-corrosion effect, too fine to form large-scale production, and increases processing cost According to GB / t6753-86 test standard, it is determined to be ≤ 80um 4 drying time: refer to other enterprise standards, and according to GB / t1728-89, it is: surface drying ≤ 4h, actual drying ≤ 24h 5 impact strength: impact strength measures the impact resistance of paint film According to GB / t1732-93, it is 50hg / cm 6 flexibility: the flexibility is to maintain the smoothness of the paint film and allow the maximum deformation of the paint film According to the GB / t1732-89 test method, it is 1mm 7 hardness: ≥ 0.5 according to GB / t1730-89 8 Covering power is mainly to measure the covering capacity of the coating, reduce the consumption, ensure the coating quality, and ensure the purpose of anti-corrosion According to the test method of GB / t1726-89, the epoxy coal tar pitch is 80g / ㎡ The special anti-corrosion coating for drinking water inner wall is: primer 80-100g / ㎡, finish 170-200g / ㎡ 9 adhesion: it reflects the adhesion ability of paint film and anti-corrosion components Good adhesion, no peeling, no peeling, good corrosion resistance According to GB / t9286-89 test standard, the adhesion is level 1 10 solid content solid content is the guarantee project of various coatings The solid content is directly related to the film thickness, consumption quota and economic benefits According to GB / t1725-89, three kinds of coatings are specified Primer ≥ 70% finish ≥ 65% 11 acid, alkali and salt resistance: acid, alkali and salt resistance are the guarantee indexes of epoxy coal tar pitch coating This anticorrosive coating is often corroded by acid, alkali and salt water If it can not withstand the corrosion of acid, alkali and salt water, it is not good anticorrosive coating This is the required index According to the provisions of GB / t1763-79 (89), the foam shall be soaked for 72h without foaming, rust and peeling Water resistance, gasoline resistance and coal oil resistance of special coating for drinking water inner wall anticorrosion The special anti-corrosion coating for the inner wall of drinking water is not only suitable for water containers, but also for beer, steam and kerosene containers According to the test regulations of GB / t7133-79, this project is respectively immersed in 60 ℃ distilled water, 70 × gasoline and aviation kerosene for 72 hours without foaming, rust and peeling Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, 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