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　　Anticorrosive coating plays an important role in paint, which is an indispensable part of paint.

　　Anticorrosive coating refers to a kind of liquid or solid material that can form a film on the surface of an object under certain conditions to protect, decorate or perform other special functions (insulation, rust prevention, mildew prevention, heat resistance, etc.). There are three main functions: protection, decoration, and disguising the defects of products, to enhance the value of products.

　　Most people should be unfamiliar with it, some people will ask: how to distinguish the quality of anticorrosive coating? What is the testing standard of anticorrosive coating and how to test it?

　　Now, let's learn more about the quality of anti-corrosion coating through a few simple tests

　　1. Test of film adhesion

　　Paint adhesion refers to the ability of the paint film to combine with the surface of the object to be coated or the coating.

　　General test standards for film adhesion are:

　　GB / T 1720-1979 determination of film adhesion

　　GB / T 9286-1998 paints and varnishes - cross cut test of film

　　GB / T 5210-2006 paints and varnishes - pull off adhesion test

　　2. Detection of film thickness

　　The thick film standard of general anticorrosive materials is about 100 μ m or 150 μ M. The heavy-duty anticorrosive coating should be more than 300 μ m or more. Within the scope of this standard, it has the best anti-corrosion effect. So it is very important to measure the modulus.

　　Test standards include:

　　GB / T 13452.2-2008 paints and varnishes -- Determination of film thickness

　　3. Fineness Test

　　That is, the fineness of the solid matter of the coating. Fineness has great influence on film quality, film gloss, durability and storage stability. But it is not the finer the better, too small will affect the adhesion of the paint film.

　　Test standards include:

　　GB / T 1724-1979 determination of fineness of coatings

　　GB / T 6753.1-2007 paints, varnishes and printing inks -- Determination of fineness of grinding

　　4. Viscosity test

　　Viscosity, also known as viscosity, refers to the resistance of fluid to flow. Viscosity is used to indicate the viscosity of paint.

　　Test standards include:

　　GB / T 2794-2013 determination of viscosity of adhesives single cylinder rotational viscometer method

　　GB / T 9269-2009 determination of viscosity of coatings -- stomer viscometer method

　　GB / T 1723-1993 determination of viscosity of coatings

　　GB / T 6753.4-1998 paints and varnishes -- Determination of efflux time by efflux cup

　　5. Detection of nonvolatile content

　　The content of non-volatile matter is also called solid content. Its content has a great relationship with the film quality and the use value of the coating.

　　The test standards for nonvolatile content are as follows:

　　Paints, varnishes and plastics -- Determination of non-volatile matter content

　　Of course, there are many testing methods and standards for anticorrosive coating. In the future, we will gradually popularize science for you