Preparation method of alloy cladding layer for prolonging wear-resistant and corrosion-resistant service life of marine total immersion area steel structural member

Abstract

The invention discloses a preparation method of an alloy cladding layer for prolonging the wear-resistant and corrosion-resistant service life of a steel structural part in a marine total immersion area. The raw materials of the carbide ceramic particle alloy material comprise the following components in percentage by mass: 18-22 wt% of Cr; %, Ti: 16 to 24 wt.%; 8 to 12 wt.% of Al; si: 0.5 to 3 wt.%; the total amount of other impurity elements is less than or equal to 0.15 wt.%; ni: the balance; wt.% of WC: 10 to 15 wt.%. After Ni and Cr are completely melted, Al, Si and Ti are added, and molten alloy powder is subjected to heat preservation to obtain a molten alloy solution; carrying out atomization and powder preparation to obtain a Ni-Cr-Ti-Al-Si alloy powder material; the alloy powder and WC particles are placed in a planetary ball mill to be subjected to ball milling and uniform mixing, screening is conducted after ball milling is completed, and a powder material for cladding is obtained; and a cladding layer is prepared by adopting a multi-lap-joint cladding method. The method can effectively solve the problems of uniform corrosion and local corrosion caused by corrosion and abrasion of the steel structural part in the marine total immersion area.

Description

technical field [0001] The invention relates to the fields of corrosion and wear protection technology, surface engineering technology, and metal material technology, and in particular to a method for preparing an alloy cladding layer for improving the wear and corrosion resistance life of steel structures in marine full immersion areas. Background technique [0002] With the proposal of the national "marine power strategy", offshore wind power development, as an important part of it, has continuously achieved breakthroughs and innovative results. However, with the further development of offshore wind power from offshore to deep sea and the acceleration of the national policy of "reducing electricity price subsidies" for renewable energy power generation, the offshore wind power industry is facing new challenges, and technological innovation and cost reduction and efficiency enhancement are imminent. It is estimated that the post-operation and maintenance costs of offshore w...

AI Technical Summary

Problems solved by technology

Although the anti-corrosion coating is simple in construction, it has great limitations: (1) The bonding strength is not high

The coating is easy to peel off under conditions such as long-term erosion and impact of mud and sand, and loses its protective effect; (2) It is easy to cause local corrosion and pose a great safety hazard

In the seawater immersion area, due to the poor electrical insulation of the coating, cathodic protection is prone to overprotection, and the coating is easily peeled off and foamed under the damage of hydrogen evolution and alkaline degradation under overprotection, resulting in local corrosion and reducing the overall anti-corrosion effect; (3) It is difficult to solve the problem of biofouling

The coating needs to meet the requirements of non-toxicity to the environment, but marine organisms are easy to attach to the surface of the coating, resulting in fouling and damage

Therefore, in the current joint anti-corrosion technology of coatings and cathodic protection for marine full immersion areas, it is difficult for coatings to meet the anti-corrosion requirements and to escort cathodic protection technology

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