Paint knowledge | testing methods of anticorrosive coatings performance testing of anticorrosive coatings

Core tip: the test method of anticorrosive coating must conform to the national chemical industry standard Hg / T 2798-1996 chlorinated rubber anticorrosive coating and HT / t2661-1995 chlorosulfonated polyethylene anticorrosive coating, etc The performance of common coating film, such as the detection of physical and chemical properties such as container state, fineness, workability, drying time, film appearance and color, adhesion, solid content, flexibility, impact strength, alkali resistance, etc Testing methods for anticorrosive coatings testing methods for anticorrosive coatings performance testing methods for anticorrosive coatings must conform to the national chemical industry standard Hg / T 2798-1996 chlorine Application scope and advantages of roller ceramic coating Recommended introduction: the surface of ceramic rubber plate used for roller ceramic coating is cast into durable rubber plate by hundreds of independent small ceramic pieces Each ceramic piece has raised characteristics Under general conveyor belt pressure, thousands of unique cast bumps can produce positive traction, prevent slipping and extend the service life of conveyor belt roller At the same time, the bottom layer adopts high-quality rubber, which has strong elasticity and can play a good impact resistance role The scope of application of roller ceramic coating is one three six 83857180 (the same as V) 1 Roller coating in extremely harsh working environment 2 The belt joint is not suitable for fixing with iron buckle; 3 It is suitable for leather Home of coatings: the detection method of anti-corrosion coating must meet the requirements of national chemical industry standard Hg / t2798-1996 chlorinated rubber anticorrosive coating and HT / t2661-1995 chlorosulfonated polyethylene anticorrosive coating The performance of common coating film, such as the detection of physical and chemical properties such as container state, fineness, workability, drying time, film appearance and color, adhesion, solid content, flexibility, impact strength, alkali resistance, etc Test methods for anticorrosive coating test methods for anticorrosive coating performance test methods for anticorrosive coating must conform to the national chemical industry standard Hg / t2798-1996 chlorinated rubber anticorrosive coating and HT / t2661-1995 chlorosulfonated polyethylene anticorrosive coating, etc See Table 1-1, Table 1-1 for the main content of the test method of anti-corrosion coating In addition to the test method for the corrosion resistance of the coating in the table, the performance of the coating of the common coating is also tested, such as the physical and chemical properties of the coating in the container state, fineness, workability, drying time, appearance and color of the coating, adhesion, solid content, flexibility, impact strength, alkali resistance, etc The meaning and test method of performance index of anticorrosive coating 1 Water resistance and water resistance refers to the measurement of water resistance of coating The test is to immerse the coating test plate in water under the specified conditions, and observe whether there are whitening, loss of light, blistering, falling off and other phenomena And how easy it is to restore the original state This will directly affect the service life of the coating The test method can be in accordance with the provisions of GB / t1733 test method for water resistance of paint film 2 Salt water resistance salt water resistance refers to the resistance of the coating to salt water erosion The salt water resistance test can be used to judge the protective performance of coating products The test method can be in accordance with the provisions of GB / t1763-89 test method for salt water resistance of paint film or gb16834-89 test method for salt water resistance of marine paint 3 Resistance to petroleum products resistance to petroleum products refers to the measurement of the ability of the coating to resist the damage of petroleum products (i.e gasoline, lubricating oil, solvent, etc.) The test method can be in accordance with GB / t1734-93 test method for gasoline resistance of paint film or Hg / T 3343 test method for oil resistance of paint film 4 Heat and humidity resistance refers to the ability of coating to resist the damage of hot and humid environment In the detection of corrosion resistance of coating, the detection of heat and humidity resistance is often carried out at the same time as the salt spray resistance test The test method can be in accordance with the provisions of GB / t1740-89 determination of film resistance to damp heat or GB / T 19893-92 determination of wet heat resistance of paints and varnishes by continuous condensation immersion method 5 Salt spray resistance salt spray resistance refers to the ability of the coating to resist salt spray erosion It is the key index of the corrosion resistance of the coating and the accelerated test method of salt spray corrosion in the simulated atmosphere The test method can be carried out in accordance with the provisions of GB / t1771 determination of neutral salt spray resistance of paints and varnishes 6 Chemical reagent resistance chemical reagent resistance refers to the ability of the coating to resist the damage of acid, alkali, salt and other chemicals The test method can be in accordance with the provisions of GB / T 1763 determination of chemical reagent resistance of paint film, GB / t9274-88 determination of liquid medium resistance of paints and varnishes and GB / T 9265 determination of alkali resistance of architectural coatings 7 Chemical gas resistance chemical gas resistance refers to the ability of the coating to resist the action of chemical gases such as industrial waste gas and acid mist in the drying process and keep the original performance unchanged See table 2-2, table 2-2 for the test method of chemical gas resistance of the coating 8 Heat resistance and heat resistance refer to the ability of the coating to maintain the original performance and resist damage under a certain high temperature The test method can be carried out in accordance with GB 1735-79 determination of film heat resistance 9 Cathodic disbondability cathodic disbondability refers to the phenomenon that the adhesion between the coating and the substrate is destroyed due to the effect of cathodic products The cathodic exfoliation test is mostly used for anticorrosive coating of pipeline This is because the pipeline in the process of transportation and laying, often may cause the coating cracks and other damage When buried in the ground, the soil has more or less certain humidity to form electrolyte Due to the electric stress generated by the soil potential and the potential cathodic protection potential, the outer edge of the coating crack or damage will start to loosen, or even peel off, leading to the early corrosion of the coating The test method can be in accordance with GB / t7790-1996 test method for cathodic disbondability of antirust paint Observe the change of blistering and adhesion of the film Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,