The characteristics of oil marks on the surface of aluminum profiles reflect:
The oil stains of the aluminum profile are not wiped clean before aging, and watermarks will be generated on the surface of the aluminum after aging, and they will appear dark spots and have a certain depth after oxidation.
Causes of oil stains on the surface of aluminum profiles:
1. The oil stains of the finished saw are left at both ends of the aluminum profile, and the gloves are not clean or even sticky to graphite ash when moving (lifting) the material;
2. When the aluminum profile is stretched, the glove is dirty and the material is too long, and the sawing is not removed;
3. The gloves are dirty when the middle material is sorted, leaving a "mark";
4. Oil leakage from extrusion equipment tools (driving, lifting belt).
Oil stain elimination method on the surface of aluminum profile:
1. Material management in the process of aluminum production, aluminum alloy profiles http://www.aps.com.cn/ Gloves should be clean when lifting and lifting materials, and oil stains should be wiped off in time;
2. When stretching aluminum, the material should be appropriate;
3. Material management, gloves when lifting and lifting materials, and gloves when adding rods should be separated;
4. Pay attention to oil leakage in equipment and tools, and keep the paper pads and suspenders clean.
The characteristics of the surface watermark of aluminum profiles reflect:
Silver-gray wet spots appear on the surface of aluminum profiles, and aluminum alloy profiles fade or disappear with the increase of the strength of alkali oxide washing.
Causes of watermarks on the surface of aluminum profiles:
The surface of the aluminum profile is locally wet with water and rain, and the fine pores of the quenching oxide layer on the surface of the profile penetrate into the aluminum matrix, forming trihydroxyl aluminum stone, which appears light and light with the length of water residence time, and if there are impurities (salt, nitrite acid, etc.) in the water, corrosion spots will occur.
Aluminum profile surface watermark removal method:
The aluminum profile that has been stained with water should be dried as soon as possible, and must be dried before the expiration date, and the alkali time and oxide film thickness should be appropriately increased if the conditions are sufficient.
Final summary:
As long as the aluminum profile is wiped clean in time before the dust-free period, there will be no oil marks and watermarks, the key is to cultivate good operating habits and quality awareness, nothing else. There have been low-level quality accidents in which oil-based paper as profile liners are stained with oil stains after self-effect.
