The surface water mark is a light white or light black irregular water mark formed on the surface of the aluminum extruded product.
(1) Causes of water marks on aluminum alloy sheets
Aluminum alloy sheet products are not well dried after cleaning, and residual moisture remains on the surface of the product;
After the rain or the like causes residual moisture on the surface of the product, it is not treated in time;
The fuel of the aging household contains water, and the moisture condenses on the surface of the product during cooling after the aging of the product;
The fuel of the aging furnace is not clean, and the surface of the aluminum alloy sheet product is corroded by the burned sulfur dioxide or contaminated by dust.
(2) Water mark prevention measures for aluminum alloy sheets
Keep the surface dry and clean;
Control the water content and cleanliness of the aging furnace fuel;
Article source: www.bombgroup17.com Aluminum alloy sheet, imported aluminum alloy