Surface treating agent for smooth foamless aluminum alloy

Abstract

The invention discloses a surface treating agent for smooth foamless aluminum alloy. The surface treating agent comprises the following raw materials in parts by weight: 0.8-2 parts of hydroxyethyl oleic imidazoline betaine, 1-2 parts of locust bean gum, 0.1-0.2 part of neodymium acetate, 1-2 parts of ethylene diamine tetraacetic acid, 0.3-1 part of antimony oxide, 1-2 parts of sodium tungstate, 2-3 parts of magnesium nitrate, 0.3-1 part of graphite powder, 0.1-0.2 part of dioctyl sebacate, 2-3 parts of 1, 4-cyclohexanedimethanol, 2-3 parts of a coalescing agent, 8-12 parts of 3-amino propyl trimethoxy silane, 6-10 parts of silane coupling agent KH570, and 110-140 parts of de-ionized water. The surface treating agent can form a stable and even coating film on the surface of the aluminum alloy; and the coating film is foamless and smooth, and has the advantages of strong compactness, good leakage resistance, strong corrosion and bacterial resistance and good easy cleanness.

Description

[0001] technical field [0002] The invention mainly relates to the field of surface treatment, in particular to a smooth and foam-free aluminum alloy surface treatment agent. Background technique [0003] There are many surface treatment methods for aluminum alloys, such as physical methods, chemical methods, physicochemical methods, and comprehensive methods. The commonly used method is the anodic oxidation method, which forms a conversion film on the surface of the aluminum alloy by an electrochemical method. Although this method can improve the smooth and bubble-free performance of the aluminum alloy, its ability to adapt to the environment is poor, and the conversion film layer is not uniform enough. The wear resistance has not been improved, and the traditional phosphate conversion and chromate passivation surface treatment technology can obtain good results, but the waste liquid discharged during the treatment process contains zinc, manganese, nickel, chromium and o...

AI Technical Summary

Problems solved by technology

The commonly used method is the anodic oxidation method, which forms a conversion film on the surface of the aluminum alloy by an electrochemical method. Although this method can improve the smooth and bubble-free performance of the aluminum alloy, its ability to adapt to the environment is poor, and the conversion film layer is not uniform enough. The wear resistance has not been improved, and the traditional phosphate conversion and chromate passivation surface treatment technology can obtain good results, but the waste liquid discharged during the treatment process contains zinc, manganese, nickel, chromium and other heavy metals Carcinogens such as ions and matte-smooth and non-foaming substances are very serious to environmental pollution, and the metal surface silanization treatment technology is considered to be expected to replace phosphate conversion treatment because it does not involve substances that endanger the environment, the production process has low energy consumption, and the technology has a wide range of applications. And chromate passivation treatment is the latest development direction of metal surface protection alone