In a broad sense, coatings with certain special functions such as radiation resistance, aging resistance, and high peel strength are called functional coatings. Commonly used functional coatings mainly include the following types:
Ferrosilicon is an
iron alloy composed of iron and silicon. Ferrosilicon is an iron-silicon alloy
made from coke, steel shavings, quartz (or silica) and smelted in an electric
furnace. Since silicon and oxygen can be easily synthesized into silica,
ferrosilicon is often used as a deoxidizer in steelmaking, and since SiO2
generates a large amount of heat during deoxidization, it is also advantageous
to increase the temperature of molten steel. At the same time, ferrosilicon can
also be used as an alloying element additive, widely used in low-alloy
structural steels, spring steels, bearing steels, heat-resistant steels, and
electrical silicon steels. Ferrosilicon is often used as a reducing agent in
ferroalloy production and chemical industries.
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(I) Antifouling paint
Anti-fouling paints are generally painted on the underwater facilities and anti-rust paint on the bottom of the ship, located on the outermost layer. Its main role is to gradually release toxic materials through the hydrolysis, diffusion or exudation of the poisonous material in the paint film, so as to prevent the attachment of marine attached organisms to the underwater facilities or the bottom of the ship.
(B) waterproof coating
Waterproof coating refers to a coating used to prevent water ingress and leakage. The coating should have hydrophobic, flexible, elastic, adhesive properties to the base layer. Generally used in residential houses such as kitchens, bathrooms, basements, etc., in wet places.
(III) Anti-corrosion coating
Conventional anti-corrosion coatings are used to prevent corrosion of metals, protect the life of non-ferrous metals under general conditions, and heavy anti-corrosion coatings can be used in relatively harsh corrosive environments and have a longer time than conventional anti-corrosion coatings. A type of anti-corrosion coating during the protection period. Anti-corrosion coatings are widely used in construction, transportation, medical, petrochemical, electric power and other industries, and their anti-corrosion function lies in the coating's shielding effect, resistance effect, wet adhesion, chemical passivation and cathodic protection.
(D) high temperature coating
The high-temperature resistant coating refers to a coating that can withstand oxidation corrosion in a high temperature environment within a certain time limit within a certain temperature range, so as to protect the coated product from normal work under high temperature. The coating is widely used in steel manufacturing, metallurgy, petroleum industry, natural gas extraction, aerospace and other industrial fields.
(five) elastic coating
The elastic coating is based on a synthetic resin emulsion, formulated with pigments, fillers and auxiliaries, and applied to a certain thickness (dry film ≥ 150 μm). An elastic functional coating with a detailed crack that covers the substrate to stretch (move).
Several important functional coatings