Oil marks on the surface of aluminium profiles:
The oil stains of aluminium profile before aging are not washable, the oil stains on the surface of aluminium watermarking after aging, the black spots after oxidation and a certain depth.
The causes of oil marks on the surface of aluminium profiles are as follows:
(a): After sawing the finished product, the two ends of the aluminium profile are greasy, the gloves of moving (lifting) material are not clean, and even stick to graphite ash.
(2) The gloves are too long when the aluminum profile is stretched and the material is not taken out when sawing.
Gloves are dirty, leaving a "mark" in the middle.
(4) Oil leakage of extrusion equipment and tools (driving vehicles, lifting belts)
Method of eliminating oil mark of aluminium profile:
(1) In the process of aluminium processing, gloves should be kept clean during handling and removal, and oil contamination should be removed in time.
(2) When drawing aluminium, take good material.
(3) When handling materials, when lifting and moving gloves and drawing materials, add gloves separately.
(4) Pay attention to oil leakage of equipment and tools, and clean the paper cushion strip and suspension belt.
Aluminum plate manufacturer
The characteristics of watermarking for aluminium profile:
Silver grey wet spot appeared on the surface of aluminium profile.
Causes of Watermarking on Aluminum Profile Surface:
The surface of aluminium profile is partly soaked by water and rainwater. The pore of quenched oxide layer penetrates into the aluminium matrix to form trihydroxyaluminate. With the prolongation of water holding time, the trihydroxyaluminate appears bright and weak. If there are impurities in the water (salt, nitrite, etc.), corrosion spots will occur.
Watermarking removal of aluminium profile surface:
(I): The wet aluminium profile must be dried immediately and must be dried before aging.
(2) Increase alkali washing time and oxide film thickness when conditions permit.
Oil stain and water stain will not occur as long as aluminium profile is wiped clean without dust before aging. The key is to develop good operating habits and quality awareness, in addition.
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