1. Overview of ceramic coatings
To solve the fire and weather resistance, but also can highly scratch resistant paint production. First of all, we must consider the performance of the surface coating of aluminum plate, only to solve the performance of the surface of the coating can be produced at the same time with fire A1 level and high scratch resistance, while having a beautiful effect, only ceramic coating and enamel can be achieved, this paper focuses on the decorative materials of the beginning of aluminum plate, should be different from the two processing processes, aluminum plate can only use ceramic coating.
The main film-forming material of ceramic coating is pure inorganic silicate. Or two-component coatings: silicates and hardeners are packaged separately. The general chemical formula of silicate is M2O·mSiO2·nH2O. M is sodium and potassium ions; m is the modulus. The curing agent is mainly inorganic metal oxide.
If it's a high-temperature baked two-component paint. Silicates are hydrolyzed to Si (OH) 4 by water, and after intramolecular dehydration, they form a network structure. High temperature baking makes dehydration more complete and network structure more dense; Using advanced "alkali metal ion immobilization technology", adding metal oxides to make the alkali metal wrapped, forming a strong complex structure, and further improving the water resistance, acid resistance, scrubbing resistance and high temperature resistance of the network structure. The silicon oxygen bond (SI-O) has a bond energy of 101KCAL/MOL, which is much larger than the general carbon-carbon bond (C-C) bond energy of 83.2KCAL /MOL, and the atomic radius of silicon atom (Si) is smaller than that of carbon atom (C), and the electronegativity is large, so it is extremely stable and not susceptible to external conditions.
1.1 Characteristics of ceramic coatings
Ceramic coatings have incomparable advantages of other coatings, and the following summarizes several characteristics:
A. Pollution resistance: It has the water resistance and corrosion resistance of various chemical solvents that ceramics have; Inorganic materials have the ability to eliminate static electricity, so that it is not easy to adhere to pollutants in the atmosphere, such as the final maintain a gorgeous appearance.
B. High weather resistance: The coating film of baked porcelain plate composed of inorganic solvents and inorganic pigments is aging due to its resistance to ultraviolet light, acid rain, automobile exhaust gas and atmospheric pollution, and is a semi-permanent material.
C. Stable structure: Just like rocks or ceramics will not change after a long time of weathering, ceramics have unique structural stability. The three-dimensional network structure formed by pure inorganic resin and inorganic pigment can extend the life of the building in the external environment such as ultraviolet light, acid rain, wind and thermal radiation.
D. Environmental protection: pre-treatment by sandblasting, water as the dispersant of the paint.
E. Excellent fire performance: incombustible of building materials (refractory Level 1) : Ceramic coatings composed of inorganic coatings and inorganic pigments are A1 in fire performance, so they will not produce toxic gases due to combustion in a fire.