Treatment method for corrosion resistance of metal surfaces

Abstract

The invention belongs to the field of metal surface treatment, and relates to a treatment method for corrosion resistance of metal surfaces. The treatment method comprises the following steps of (1) performing polishing; (2) performing alkaline degreasing; (3) performing cleaning; (4) performing drying; (5) performing activation; and (6) performing inactivation. According to the method disclosed by the invention, an inactivation film which is high in binding force, good in corrosion resistance, good in color uniformity and good in glossiness is generated on the metal surfaces through a chemical reaction, so that the effect of corrosion resistance for metal is achieved, and further the use deadline of the metal is prolonged.

Description

technical field [0001] The invention belongs to the field of metal surface treatment and relates to a treatment method for corrosion resistance of metal surfaces. Background technique [0002] Metal corrosion causes huge economic losses: metals are the basis of material civilization in human life, and are the most widely used in daily life. However, due to the wide application of metals, metal corrosion has brought extremely huge economic losses to human beings. According to an article published in 2003 The China Corrosion Survey Report shows that the annual corrosion loss in my country accounts for about 5% of the gross national product, and the economic loss caused by corrosion is about 500 billion yuan per year. Although metal corrosion does not cause huge economic losses in a short period of time like typhoons and tsunamis, metals are swallowed silently every moment, and the resulting annual losses far exceed the sum of economic losses caused by typhoons, tsunamis and ear...

AI Technical Summary

Problems solved by technology

Although metal corrosion does not cause huge economic losses in a short period of time like typhoons and tsunamis, metals are swallowed silently every moment, and the resulting annual losses far exceed the sum of economic losses caused by typhoons, tsunamis and earthquakes , this is only the direct loss and does not include the indirect loss; like a large power plant, because a boiler tube is corroded, it cannot work, causing some factories to stop production. This loss is undoubtedly huge

[0003] Metal corrosion pollutes the human living environment: some pipelines transporting materials are corroded, causing material leakage, and some materials such as sulfuric acid, hydrogen sulfide, carbon monoxide and other chemical materials leak, which not only pollutes a wide range, but also seriously endangers human health, such as The oil pipeline in the refinery leaks due to corrosion, and the economic loss may not be large, but the leaked oil can cause long-term damage to the soil and water for several years or even ten years

[0004] Metal corrosion causes catastrophic accidents: metal corrosion often causes catastrophic accidents, and some corrosions are often sudden, which can easily lead to catastrophic accidents; bridges collapse due to corrosion, and oil refineries cause fires due to partial corrosion of high-temperature oil transfer lines. The crash of an aircraft due to corrosion and cracking of a certain part will cause disasters, and 60% of safety accidents caused by damage to chemical plant equipment are caused by corrosion

[0005] Metal corrosion is a waste of natural resources: metal resources in the non-renewable resources on the earth are limited, and people extract metals from minerals; however, corrosion turns metals into useless substances, which causes a waste of natural resources , if things go on like this, metal resources are likely to be depleted

[0006] Providing a metal anti-corrosion protective layer for the metal surface is the most widely used treatment method today. The anti-corrosion protective layer can be produced by electroplating, hot-dip plating, etc., so as to separate the metal surface from substances that can cause corrosion, thereby avoiding metal corrosion. The metal surface is corroded due to contact with corrosive substances on the surface; however, the process of forming an anodic oxidation film through electroplating anodization not only consumes a lot of energy, but also the electrolyte solution used after electroplating is seriously polluted to the environment, which limits it; while hot-plating High-temperature treatment is required, which increases energy consumption, and due to high-temperature treatment, it is easy to cause reduction in process performance and usability

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