Coated steel mass inspection standards are mainly what?

The quality inspection of color-coated plates is mainly the inspection of coating pretreatment and coating performance. The pretreatment inspection of coating includes two aspects of degreasing Chengdu and chemical conversion coating. Coating detection includes two aspects: the mechanical properties of the coating (such as adhesion, flexibility, impact strength, hardness, gloss, etc.) and the special properties with protective functions (such as weather resistance, acid and alkali resistance and oil resistance). Among them, the mechanical properties are the basic routine properties that need to be tested in the quality inspection of coatings, while the characteristic properties with protective functions can be selectively tested according to different application requirements. There are relevant testing standards for the above two performance tests in the world.

A. Testing standard for coating pretreatment performance

(1) GB/T 11376-1997 "Metal Phosphate Conversion Coating"

(2) GB/T 17460-1998 "Chemical Conversion Coatings on Aluminum and Aluminum Alloys with Rinse and Non-Rinse Chromate Conversion Coatings"

(3) GB/T 9792-1988 "Gravimetric method for the determination of the mass of the upper and lower film layers per unit area of ​​the conversion film on metal materials"

(4) GB/T 13312-1991 "Test method for degreasing degree of steel parts before painting (oil test market value method)"

(5) GB 8923-1988 "Steel surface corrosion grade and derusting grade before painting"

(6) GB/T 12612-1990 "General Technical Specifications for Multifunctional Iron and Steel Surface Treatment Fluids"

(7) GB/T 13288-1991 "Assessment of surface roughness grade of steel before painting (comparison sample method)"

B coil coating and thinner performance testing standards

(1) GB 386-82 (1998) Sampling of paint products;

(2) GB/T 1723-93 paint viscosity determination method;

(3) GB 1724-89(79) Determination of paint fineness;

(4) GB 1725-89(79) Determination of solid content of paint;

(5) GB 6750-86 Density determination method for paints and varnishes;

(6) GB 6753.3-86 paint storage stability test method;

(7) GB/T 1721 Determination of appearance and transparency of varnishes, varnishes and thinners;

(8) GB/T 1722-1992 Color determination method for varnishes, varnishes and thinners;

(9) GB/T 1751 Determination method for diluent and anti-humidity agent;

(10) GB/T 1751 Determination of water content in diluents and anti-humidity agents.

C Coating film performance testing standard

(1) GB/T 13448-2006 "Test methods for color-coated steel sheets and strips";

(2) GB 1720-89(79) "Determination of Paint Film Adhesion";

(3) GB/T 1731-93 "Determination of Flexibility of Paint Film";

(4) GB/T 1730-93 "Determination of impact resistance of paint film";

(5) GB/T 1730-93 "Paint Film Hardness Determination Method Pendulum Damping Test";

(6) GB 5210-85 "Determination of Coating Adhesion Pulling Method";

(7) GB/T 6739-1996 "Coating Hardness Pencil Determination Method";

(8) GB 1743-89 (79) "Determination of Paint Film Gloss";

(9) GB 1743-89 (79) "Determination of Abrasion Resistance of Paint Film";

(10) GB 1769-89 (79) "Determination of Polishing Properties of Paint Films";

(11) GB 6742-86 "Paint Film Bending Test (Cylindrical Shaft)"

(12) GB 1865-89 (80) "Determination of Paint Film Aging (Artificial Acceleration)";

(13) GB/T 1771-91 "Determination of Paint Film Resistance to Neutral Salt Spray".