Die cast aluminum alloy surface treatment process

Abstract

The invention discloses a die cast aluminum alloy surface treatment process. The process comprises the following steps that a, grinding is conducted, specifically, die cast aluminum alloy is subjectedto grinding treatment; b, sand blasting is conducted, specifically, the ground die cast aluminum alloy is subjected to sand blasting treatment; c, degreasing is conducted, specifically, the die castaluminum alloy subjected to sand blasting treatment is subjected to degreasing treatment through an alkaline solution; d, alkali corrosion is conducted, specifically, surface cleaning treatment is conducted through an alkaline solution; e, anodizing is conducted, specifically, the die cast aluminum alloy subjected to alkali corrosion is subjected to anodizing treatment, and an oxide film is formedon the surface of the die cast aluminum alloy; f, activation is conducted, specifically, the anodized die cast aluminum alloy is subjected to activation treatment; g, dyeing is conducted, specifically, the die cast aluminum alloy subjected to activation treatment is subjected to dyeing treatment; and h, hole sealing is conducted, specifically, the dyed die cast aluminum alloy is subjected to holesealing treatment. The problems that existing die cast aluminum alloy contains metal components such as silicon, copper and iron, thus, die cast metal structures are ununiform, and anodizing treatment cannot be conducted due to the fact that black spots are caused easily are solved.

Description

technical field [0001] The invention relates to the field of metal surface treatment, in particular to a die-casting aluminum alloy surface treatment process. Background technique [0002] Anodizing is a process in which aluminum and its alloys form an oxide film on aluminum products (anodes) under the corresponding electrolyte and specific process conditions under the action of an applied current. It is a mature surface treatment technology. At present, the anodic oxidation treatment seen on the market is mostly used in aluminum alloy plate products, and aluminum die-casting parts have been widely used recently, such as radiators and automobile fasteners. However, due to the copper, copper, and Metal components such as silicon and iron make the die-casting metal structure inhomogeneous, and are prone to blackening or black spots that cannot be anodized, which affects the diversity of metal appearance of die-casting aluminum alloys. [0003] Based on the above, there is an ...

AI Technical Summary

Problems solved by technology

[0004] In view of the above deficiencies, the object of the present invention is to provide a surface treatment process for die-casting aluminum alloys, which solves the problem that the existing die-casting aluminum alloys contain silicon, copper, iron and other metal components that make the die-casting metal structure inhomogeneous and prone to black spots. Instead of the problem of not being able to perform anodic oxidation treatment, it is possible to obtain die-casting aluminum alloy products with diverse metal appearance effects