Le processus de galvanisation à chaud est une solution de traitement de surface de l'acier relativement stable et fiable pour résister à la corrosion environnementale.. De nombreux facteurs affectent la galvanisation à chaud, tel que: composition du substrat en acier, état de surface (comme la rugosité), contrainte interne du substrat, géométrie L'épaisseur du matériau de base a un plus grand impact sur l'épaisseur de la galvanisation à chaud, and generally the thicker the steel pipe is, the greater the thickness of hot-dip galvanizing. According to the requirements of the national standard, the local thickness of hot-dip galvanizing should not be less than 56μm, and the average thickness should not be less than 70μm.
If calculated according to the national standard, the average thickness is 70μm, the amount of zinc attached is 70×7.2=504g/m2, and the service life in four different environments is about:
Heavy industrial park: 12 ans, the annual corrosion rate is 40.1;
Coastal area: 46 years with a corrosion rate of 10.8 per year;
Suburban areas: 93 ans, with an annual corrosion rate of 5.4;
Urban areas: 28 years with an annual corrosion rate of 17.5;
Hot-dip galvanized seamless pipe is processed by pickling and rust removal, zinc pool galvanizing, surface passivation and other processes, so that the zinc pool is firmly attached to the surface of the steel pipe. Galvanized seamless steel pipes last longer.
If you want to further improve the anti-rust effect of galvanized steel pipe, you can use the method of physical anti-rust, C'est, brush a layer of anti-rust paint or spray a layer of anti-rust paint on the surface.