Corrosion resistance comparison between Zn-Al-Mg coating and other coating types
A. Comprehensive data comparison
(1) The salt spray test of the plane part is similar to that of the aluminum-zinc-silicon plate, which is about 10-20 times that of the galvanized plate, and 5-8 times that of the galvanized-5% aluminum alloy.
(2) The salt spray test of the notched section, the bent part and the scratched part is better than that of galvanized silicon plate, galvanized-5% aluminum plate and galvanized plate.
(3) The ammonia resistance is twice that of galvanized sheet and 10 times that of galvanized silicon sheet.
(4) Acid and alkali resistance is similar to galvanized sheet, better than galvanized silicon sheet and galvanized -5% aluminum sheet.
(5) When the coating is 90g/m2, the corrosion resistance is more superior than the 560g/m2 coating obtained by hot-dip plating after processing into workpieces.
B. ZAM board salt spray test comparison
The comparison of red rust occurrence time of ZAM board and other three common coatings in salt spray test is shown in the above figure. It can be seen that the red rust occurrence time of ZAM board is the longest.
C. SD board exposure test comparison
The SD board and other common three kinds of coatings are compared with the fracture state after 8 months and 20 months in the outdoor exposure test, as shown in the figure below. Corrosion is reduced instead.
D. ZM plate parts cycle test comparison
The following is a group of comparison photos of auto parts made of ZM plate after corrosion resistance cycle test. It can be seen that the corrosion resistance of ZM70 coated products is better than that of Z100 coated products.
Hot Tags: zn-al-mg coated steel coil, China, manufacturers, suppliers, factory, made in China