Advantages of hot dip galvanizing
1. The entire steel surface is protected. No matter inside the recessed pipe fittings or any other corner where the coating is difficult to enter, the molten zinc can be easily and evenly covered.
2. The hardness of the galvanized layer is greater than that of steel. Impact resistance and wear resistance are quite good.
3. In the corner areas, the zinc layer is often thicker than in other places, and has good toughness and wear resistance. Other coatings at this corner are often thin and difficult to apply, and are easily damaged, so they often need to be maintained.
4. Even if it suffers heavy mechanical damage or other reasons. A small part of the zinc layer will fall off, exposing the iron base. At this time, the surrounding zinc layer will also act as a sacrificial sun to protect the steel here from corrosion. The opposite is true for other coatings. Rust will form immediately and quickly spread underneath the coating, causing the coating to peel off.
5. The consumption of zinc layer in the atmosphere is very slow, about 1/17-1/18 of the corrosion rate of steel, and it is predictable. Its lifespan is longer than any other coating.
6. The coating life span depends on the thickness of the coating under a specific environment. The thickness of the coating is determined by the thickness of the steel. That is, the thicker the steel, the easier it is to get a thicker coating. Therefore, the thicker steel parts in the same steel structure must also get a thicker coating to obtain a longer life.
7. For reasons of beauty, art, or when used in specific severely corrosive environments, the galvanized layer can be painted again. As long as the paint system is correctly selected and the construction is easy, the anti-corrosion effect is better than painting alone and heat treatment. The life span of dip galvanizing is even better in total.