Anti-corrosion copper-plated carbon steel and preparation method thereof

Abstract

The invention discloses anti-corrosive copper-plated carbon steel and a preparation method thereof, belonging to the technical field of anti-corrosive treatment. The method comprises the following steps: chemical copper leaching: soaking carbon steel in a copper-plating solution at 20-40 DEG C for 15-60 seconds to ensure that the surface of the carbon steel is coated with a copper layer, wherein the concentration of Cu<2+> in the copper-plating solution is 0.1-0.5mol / L, and the concentration of H<+> in the copper-plating solution is 3-6mol / L; and passivation treatment: performing treatment on the carbon steel subjected to chemical copper leaching in a passivation solution at 50-80 DEG C for 3-10 minutes, and performing blow-drying to obtain the anti-corrosive copper-plated carbon steel. The method disclosed by the invention is used for performing chemical copper plating on the surface of the carbon steel in a strong acid environment, and ensures that the bonding strength between an obtained plating layer and the carbon steel is more than 20MPa, and the plating layer has good anti-corrosive performance. Moreover, the method has the advantages of simple process, convenience in operation, short treatment time, energy conservation and easiness in implementation of industrial production.

Description

technical field [0001] The invention relates to the technical field of anti-corrosion treatment, in particular to an anti-corrosion copper-plated carbon steel and a preparation method thereof. Background technique [0002] With the popularity of "UHV" projects in the power industry, the requirements for the safety and reliability of substations are getting higher and higher. Generally speaking, the entire composition of a substation can be roughly divided into an aboveground part and an underground grounding grid part. The underground grounding grid is mainly composed of carbon steel and galvanized steel. The corrosion resistance of this part of the structure plays a vital role in the stable and safe operation of the substation. However, in actual operation, the corrosion of the grounding body material is particularly serious in the soil with high corrosive ions or acidic soil. The corrosion of the grounding body material causes the grounding resistance to exceed the standa...

AI Technical Summary

Problems solved by technology

However, in actual operation, the corrosion of the grounding body material is particularly serious in the soil with high corrosive ions or acidic soil. The corrosion of the grounding body material causes the grounding resistance to exceed the standard, and even some electrical equipment "lost ground" due to corrosion fractures every year. have occurred, will directly threaten the operation security of the power grid

[0003] At present, galvanized steel is the most widely used grounding body material, but with the prolongation of service time, the galvanized layer often falls off gradually, and its corrosion resistance is not much different from that of ordinary carbon steel, which cannot significantly improve the grounding network. corrosion performance

The application of common corrosion-resistant materials such as copper and stainless steel is restricted by resources and economic reasons. The use of copper as the overall material of the grounding grid will increase the investment cost and reduce the economy. Therefore, the preparation of metal coating on the surface of carbon steel Plating is an effective method

[0004] However, the commonly used electroless nickel plating and other metal coatings and thermal spraying metal coatings have disadvantages such as complex process, long processing time, and high cost.

[0005] It is a classic chemical reaction to replace iron with copper ions to form simple copper, but so far, no one has been able to use this classic reaction in modern industrial production, because there are several destructive side reactions in it. To solve this problem, Scholars at home and abroad have carried out more detailed research, such as the research of Wu Chen et al. (Research and industrial application of the classic iron substitution copper reaction, Chemical Journal of Chinese Universities, 1996, 17 (7) 1092-1095.) found that in the replacement process Many side reactions in the reaction will produce by-products such as cuprous oxide and iron oxide, and these cuprous oxide and iron oxide are likely to cause powdering of the coating and insufficient bonding force, which is also the main reason why the classic reaction cannot be industrialized.

Images