Advantages of asphalt coatings
Asphalt coatings are favored because of their readily available raw materials, low price, and corrosion resistance to dilute alkali solution and dilute acid. Its paint film has good elasticity and fast drying, and is often used as waterproof layer.
Disadvantages of asphalt coatings
Asphalt coatings are not resistant to various organic solvents and strong oxidants, and are brittle at low temperatures. In order to make up for these shortcomings, many modified asphalt coatings have appeared in the market, such as coal tar enamel, petroleum asphalt paint and epoxy coal tar asphalt. To improve the hardness, temperature resistance, weather resistance and adhesion of the paint film.
Use of asphalt coating
Asphalt coatings are mainly used for waterproofing and anticorrosion of underground pipelines. When used for anticorrosion of underground pipelines, they are usually coated with glass cloth.
Advantages of urushiol anticorrosive coatings
Urushiol anticorrosive coating is made of raw lacquer through dehydration and polycondensation and diluted with organic solvent, thus improving the shortcomings of high toxicity and slow drying of raw lacquer. Urushiol paint has the characteristics of acid resistance, alkali resistance, ammonia resistance and water resistance, and is suitable for anticorrosion applications of ammonia, ammonia gas, chlorine gas and hydrogen sulfide gas.
Disadvantages of urushiol anticorrosive coatings
Urushiol anticorrosive coating is expensive and not suitable for all occasions.
Application of urushiol anticorrosive coatings
Urushiol anticorrosive coating is suitable for the anticorrosion application of ammonia, ammonia, chlorine and hydrogen sulfide gas. Similarly, it is also an ideal choice for moisture-proof and anti-corrosion of underground pipelines.