Type
There are many types of anticorrosive paint, according to the composition can be generally divided into: epoxy anticorrosive paint, polyurethane anticorrosive paint, acrylic anticorrosive paint, inorganic anticorrosive paint, perchloroethylene anticorrosive paint, chlorinated rubber anticorrosive paint, high chlorinated polyethylene anticorrosive paint; According to the use, it can be divided into: anti-corrosion paint for pipelines, anti-corrosion paint for ships, anti-corrosion paint for metals, anti-corrosion paint for furniture, anti-corrosion paint for automobiles, anti-corrosion paint for rubber; According to the solvent, it can be divided into: water-based anti-corrosion paint, oil-based anti-corrosion paint;
Anticorrosive paint is a mixture of a variety of aqueous silicate minerals, the main chemical group is Al2O3 and SiO2 oxides. Al2O3 is mainly derived from clay minerals, and SiO2 comes from particulate quartz in addition to clay minerals. The closer the Al2O3 content and Al2O3/SiO2 ratio are to the theoretical value of kaolinite minerals, the higher the purity of such clays.
Characteristic
Can be used under harsh conditions, and has good durability, weather resistance, can be used in marine, underground and other harsh conditions for 10 years or more than 15 years, even in acid, alkali, salt and solvent media, and under certain temperature conditions, can be used for more than 5 years.
Ingredients
The more kaolinite in the clay, the better its quality. The higher the refractory of the clay, the wider the sintering and melting range of the clay. The main impurities in clay are alkali metals, alkaline earth metals, oxides of iron, titanium, etc., and some organic substances. All kinds of oxides play a role in fluxing, which will reduce the refractory of the raw material, so the lower the content of impurities in the clay, especially Na2O and K2O, the higher its refractory. There are many types of minerals in clay, but it is usually composed of only 5~6 kinds of minerals, and the main mineral is kaolinite. Common impurity minerals are quartz, mica, iron-containing minerals, feldspar, rutile and so on. The content of impurities and the uniformity of distribution affect the fire resistance of clay. Anticorrosive paint will undergo a series of physical and chemical changes during the heating process, such as decomposition, melting, recrystallization, etc., accompanied by volume shrinkage. These changes have an important impact on the process and properties of clay products. China's clay raw materials, whether hard clay, soft clay or semi-soft clay, are mainly kaolinite type. Therefore, the heating change of clay is essentially the heating change of kaolinite and the physicochemical reaction between kaolinite and impurity minerals. Hard clay clinker is the main raw material of clay refractories, usually obtained by calcination in a direct mining of hard clay raw material blocks in an inverted flame kiln, or rotary kiln, or shaft kiln.
