Anticorrosive coatings play an important role in paint coatings and are an integral part of paint coatings. Most people should be relatively unfamiliar with it because we are not home-owners or decorators. Some people may ask: What is the testing standard for anti-corrosion coatings and how can it be detected? Let's take a look with Xiao Bian today.
First, anti-corrosion coating testing project
1, physical properties: appearance, transparency, color, adhesion, viscosity, fineness, ash, PH value, flash point, density, volume solid content, bond strength, etc.;
2, construction performance: hiding power, use, consumption, drying time (dry, dry), paint film grinding, leveling, sag, paint film thickness (wet film thickness, dry film thickness);
3, chemical properties: water resistance, durability, acid and alkali resistance, corrosion resistance, weather resistance, heat resistance, low temperature test, chemical resistance;
4. Hazardous substances: VOC, benzene content, total toluene, ethylbenzene, xylene, free formaldehyde content, sum of TDI and HDI content, glycol ether, heavy metal content (lead, mercury, chromium, cadmium, etc.);
5, electrical properties: conductivity, breakdown voltage or breakdown strength, insulation resistance, dielectric constant, dielectric loss.
Second, anti-corrosion coating testing standards
HG/T 2798-1996 Chlorinated rubber anti-corrosion coating
HG/T 2884-1997 Epoxy Asphalt Anticorrosive Coating (Packing)
HG/T 3345-1999 Colored Phenolic Antirust Paint
HG/T 3346-1999 Hongdan alkyd antirust paint
G/T 3349-2003 colored phenolic lacquer
HG/T 3358-1987 G52-31 various colors of vinyl chloride anti-corrosion paint
HG/T 3369-2003 cloud iron phenolic antirust paint
Third, anti-corrosion coating testing methods
1. The method of measuring the film adhesion
The adhesion of the coating, as the name implies, is the degree of firmness of the anti-corrosion coating attached to the material. We can use a small knife to scrape or slide on the surface of the material to see how the result is. Common methods for measuring the film adhesion include the circle-cut method, the cross-cut method, and the pull-open method.
2. Detection of film thickness
In the foregoing, the standard for thick film formation has been mentioned: Thick film standards for general anti-corrosion materials are around 100 μm or 150 μm. Heavy anti-corrosion coatings must be 300μm or more. In the scope of this standard, it has the best antiseptic effect. So the post-detection moduli are very important. The determination method is divided into destructive testing and non-destructive testing. Use these two methods to test whether the thickness is within the standard range.
Xiao Bian concludes: Anti-corrosion coatings play an important protective role in some things in our daily life such as furniture or doors. We really need to understand it. The inspection items and methods for anti-corrosion coatings were introduced here this time and I hope to be helpful to everyone. If you want to know more related information, you can pay attention to this website information.
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