Frequently asked questions about coating and coating performance testing

Coating and coating performance is critical, and we need to wake up when choosing coatings. There are a lot of things to note, and we need to know a little bit about it. Today we're talking about a variety of common problems with coating and coating performance
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Q: What are the types of coatings?
A: By form can be divided into solid paint and liquid paint, according to the use of industrial coatings and civil coatings, industrial coatings are divided into color plate paint, automotive coatings, architectural coatings, wood paint, aircraft paint, etc. , according to the effect is divided into anti-corrosion coatings, anti-rust coatings, waterproof coatings, moisturizing coatings, elastic coatings, insulation coatings, anti-fouling coatings.
Q: What is the purpose of coating analysis and testing?
A: The performance of coatings determines the quality of coatings and the use of coatings, and the performance of coatings is multi-ion. In order to evaluate the performance of the coating from different angles, many test methods have been developed, including the performance test of the coating itself and the performance test of the coating film.
Q: What is the significance of paint performance detection?
A: The analysis and testing of coatings is an indispensable and important link in the process of coating production and use, and is the main basis for the development of technical indicators for coating products, and is used to evaluate the performance and quality of coatings. 1) Through the test can provide data for the formula design and process conditions of the selected products, 2) through the analysis and testing of the coating, can correctly reflect the quality of the paint products and control the quality of the product; 3) through the test data, carry out basic theory research, find out the relationship between the parts and performance, so as to find the existing product problems and the direction of improvement, to provide a basis for the development of new products.
Q: What are the common technical indicators for coating analysis and testing?
A: The indicators of the physical state of the coating are density, viscosity, etc., the optical properties of the coating film are shiny, color, etc.;
Q: What is pencil hardness?
A: The hardness of the coating film refers to the solidity of the coating film after drying, to determine the degree of damage when it is affected by external friction and collision. There are many methods to determine the hardness of coating film, and the pencil hardness method is commonly used at present. The coating hardness pencil determination method is a pencil scraping coating film with a known hardness mark, which indicates the hardness of the coating film with the hardness mark of the pencil.
Q: What are the methods of coating film adhesion testing?
A: Coating adhesion refers to its ability to bind firmly to the surface of the coating. Adhesion is not good products, easy and surface peeling and lose its protection and decorative effect. The methods of adhesion determination are the drawing method, the drawing method, the torque method, the scratch method, the tape adhesion method and the peeling test method. The drawing method is an experimental method to assess the resistance of the coating from the substrate when cutting the coating through to the substrate with a right-angle mesh graphic. The adhesion measured by the pull-apart strength method refers to the force required to apply a vertical and uniform pull on the coil surface of the sample at a specified speed to determine the force required for damage between the coating or between the coating and the substrate.
Q: What are the methods for determining the thickness of the coating film?
A: The thickness of the coating film will affect the properties of the coating film, especially the physical and physical properties of the coating film is most obviously affected by the thickness, so the performance of the coating film must be measured within the specified thickness range. There are many methods to determine the thickness of the coating film, such as the thickness of the coating on the glass plate can be determined by a thousand minutes, the thickness of the coating on the steel plate can be determined by non-magnetic thickness measuring instrument, the thickness of the plastic coating can be determined by ultrasonic method.
Q: What are the common paint testing standards?
A: Different countries have different testing standards and requirements, commonly ISO, ASTM, GB, JIS and other standards. For example, common standards for hardness testing are ASTM D3363, ISO 15184, GB/T 6739, JIS K5600-5-4, and thickness test common standards are ASTM D7091, ASTM D1186, ISO 2808, ISO 2360, common standards for impact testing are ASTM D2794, ISO 6272, GB/T 20624, JIS K5600.