产品详情

Transfer of production technology of stain remover for aluminum alloy surface treatment

Ⅰ.Product features

Aluminum profile after alkali corrosion, the surface of gray black, commonly known as hanging ash, aluminum impurities higher content, hanging ash more serious. Generally, sulfuric acid or nitric acid is used to make aluminum "shine out" and restore its metallic luster, but due to the changes of impurities by high-temperature calcination, casting, extrusion and other processes, the hanging ash can not be completely dissolved and removed. At the same time, the use of nitric acid is highly corrosive, irritating and serious yellow smoke.

Easy to lead to industrial accidents. The scouring brightener is composed of strong oxidizer, scouring agent, corrosion inhibitor, whitening agent and so on careful formula of no smoke, no smell of acid liquid, light brown aluminum used in neutralizing tank, through the strong oxidation, complexation, weak erosion effect, can quickly remove profiles to hang on the surface of the ash after alkali corrosion, strong to grey, whitening, whitening effect, instead of nitric acid is used, the cost is low, Small dosage, simple operation process.

Ⅱ.Product operation process parameters

Parameter	slotting	reference consumption
Aluminum stain brightener	30-50 kg/m³	2～3 kg/T Al
Sulfuric acid (AR grade)	150-180 kg/m³	20～30 kg/T Al
Temperature	15～30℃
Time interval	0.5～3 min(depending on aluminum quality and tank concentration)
Tank liquid maintenance management	1、according to the concentration of test tank liquid to determine the amount of sulfuric acid and aluminum stain removal brightener; 2、 In the production process, if the light time is long or decontamination is not clean, it can be used Practical experience add aluminum stain removal brightener and sulfuric acid appropriately.