Environment-friendly constant-temperature hole sealing agent for aluminum and aluminum alloy and hole sealing technique thereof

Abstract

The invention provides an environment-friendly constant-temperature hole sealing agent for aluminum and an aluminum alloy. The environment-friendly constant-temperature hole sealing agent comprises the following components of, by total weight, 3%-15% of magnesium acetate, 0%-10% of cobaltous acetate, 5%-15% of tripropylene glycol methyl ether, 5%-15% of surfactants, 0%-10% of dust inhibiting agents, 0%-8% of accelerants, 0.5%-10% of pH buffer agents, 0%-10% of corrosion inhibitors and the balance deionized water. The environment-friendly constant-temperature hole sealing agent is good in stability and permeation effect; a hole sealing film is dense and can completely seal gaps on the surface of a workpiece; the hole sealing condition requirement is low, after hole sealing, the surface of the workpiece is flat, bright and free of discoloring, powder forming is avoided, oil fouling resistance and fingerprint resistance are achieved, and the strength, hardness and corrosion resistance ofthe workpiece are improved; the environment-friendly constant-temperature hole sealing agent does not contain elements of nickel, fluorine, chromium and the like and is safe and environmentally friendly, pollution to the operation environment is avoided, and damage to health of a human body is avoided; and the cost is low, energy consumption is less, and the environment-friendly constant-temperature hole sealing agent is suitable for being produced industrially on a large scale.

Description

technical field [0001] The invention belongs to the technical field of metal surface corrosion protection treatment, and in particular relates to an aluminum and aluminum alloy environment-friendly normal-temperature sealing agent and a sealing process thereof. Background technique [0002] Aluminum alloys have the advantages of light weight, strong corrosion resistance, and good thermal and electrical conductivity, and are widely used in aviation, aerospace, automobiles, machinery manufacturing, and civil industries. Aluminum alloy products have a disadvantage - they are easy to be corroded. In order to avoid corrosion of aluminum profiles, the surface treatment is generally anodized, which can significantly improve the corrosion resistance of aluminum and its alloys, and increase the hardness and durability of the surface of aluminum and its alloys. abrasion and corrosion resistance. However, the oxide film layer is composed of amorphous alumina with a large number of por...

AI Technical Summary

Problems solved by technology

The sealing conditions of these patents are relatively harsh, the energy consumption is high, the bath solution is not stable, and the sealing effect is difficult to meet the requirements of industrial production.

[0004] With the development of large-scale industrial production and the development of aluminum and aluminum alloy oxide film technology, higher requirements are placed on the quality of sealing holes. According to the research in the industrial production process, the current nickel-free sealing technology in industrial production is There are problems such as loss of gloss and poor gloss retention of the sealing film; uneven surface of the aluminum workpiece after sealing, easy to whiten and powder; slow sealing speed, high weight loss during detection of sealing; poor energy saving effect, short life of the bath solution, etc.