Heavy anti-corrosion paint standards: lost milliliters, thousands of miles worse!

China Coatings Network
News: for
heavy anti-corrosion coatings
, the average person should be relatively unfamiliar, it refers to the relatively conventional
corrosive coatings
can be used in relatively harsh corrosion environment, and can achieve a longer protection period than conventional anti-corrosion
coatings
a class of anti-corrosion coatings. Its categories are epoxy paint, vinyl chloride
paint
, chlorinated rubber paint, acrylic paint,
fluorocarbon paint
, alicyl acid paint, silicone high temperature paint, solvent-free anti-corrosion coatings and special anti-corrosion coatings. More used in special industries such as ship manufacturing, underwater engineering, marine engineering and other industries with high anti-corrosion requirements.
Although for ordinary people, basically no contact with this type of paint, but small editor feel it is necessary to simply understand this kind of paint, below, small editor for everyone to introduce the standards of heavy anti-corrosion coatings.
important sign of the
heavy anti-corrosion coating standard is thick filmization, compared to the conventional anti-corrosion coating of 100 m to 150 m, heavy anti-corrosion coating dry film thickness reached 200 m or more, and even some special coating dry film thickness reached a staggering 2000 m (2 mm). Thick corrosion-resistant coatings provide a reliable guarantee for the long life of coatings.
In order to achieve long-lasting anti-corrosion purposes, the main
film-forming substances
synthetic resins have high requirements, first of all, because of the particularity of the coating industry, synthetic resins must have good adhesion to the book substation, but also need to have excellent corrosion resistance to various media, such as chemical atmosphere, salt, alkali and other solvents. For example, the epoxy resin used in ordinary anti-corrosion coatings, there are problems such as weather resistance, easy to powder, and heavy anti-corrosion coatings used in the chemical atmosphere in heavy anti-corrosion coatings by using chlorine-sulfurized polyethylene rubber to modifie it and then add other components, and according to different corrosion environment requirements, it is improved into epoxy heavy anti-corrosion coating products.
Overall, the structure of heavy anti-corrosion coatings is as follows: epoxy 30%, polyurethane 20%, zinc-rich primer 16%, alcoholic acid 14%, acrylic chlorinated rubber 13%, fluorocarbon 4%, polysilica 1%, other %
heavy anti-corrosion coatings in different areas of the use of different industry-related standards, and in the same industry using different components are not the same standards. Take the shipbuilding industry as an example, the industry-related standards are: IMO "coating performance standards", in the marine drinking water warehouse applicable conditions for GB /T5395-85 marine drinking water warehouse paint general technical conditions, while the use of hull paint for GB/T6745-86 hull paint general technical conditions. That is, the standard of use of heavy anti-corrosion coatings is strict, can not be as simple as ordinary coatings can be mixed. From the previous introduction can also be seen that the manufacture of heavy anti-corrosion coatings, the use is quite strict, because it is used in special fields, so in the process of use, once the slightest error, the consequences are immeasurable! This can also answer from the side why the industry standard is so many!
According to the United States Association of Anticorrosive Engineers (NACE) certification, the best anti-corrosion coatings for water-based industrial paint, in China, the level of research and development of water-based coatings is low, in addition to Guangdong Province issued the "water-based polyurethane anti-corrosion coatings (two-part) standards", the country and other provinces and cities have not issued the relevant product standards. Some industry experts said that in order to guide China'
water-based
industry upgrading and development, the country should issue national standards as soon as possible.