Surface passivation composite cementation layer treatment for concrete bridge affiliate steel structural component and co-cementation agent adopted therein

Abstract

The invention provides surface passivation composite cementation layer treatment for a concrete bridge affiliate steel structural component and a co-cementation agent adopted therein. The co-cementation agent comprises the following components in parts by weight: 40-60 parts of zinc powder, 20-50 parts of aluminum powder, 10-40 parts of Zn-Al-Mg alloy powder and 0.05-2 parts of a rare earth catalyst. According to the method disclosed by the invention, a multicomponent alloy cementation layer is formed on the surface of the steel structural component by the co-cementation layer, and then the co-cemented steel structural component is welded according to a design drawing; electric arc spraying is adopted at a welding joint part, so that a multicomponent alloy layer is formed; and then a passivation agent is used for performing surface passivation sealing treatment on the welded component, so that the novel passivation composite cementation layer (PCA) is formed (steel plate multicomponentalloy co-cementation plus welding joint part electric arc spraying plus passivation treatment with the heavy-metal-element-free passivation agent). The concrete bridge affiliate steel structural component which is obtained through treatment in the invention has good corrosion-resistance and prominent wear-resistance, so that safety and quality are ensured.

Description

technical field [0001] The invention belongs to the technical field of chemical heat treatment and anticorrosion on the surface of metal materials. More specifically, the invention relates to a co-infiltration agent for forming a multi-element alloy infiltration layer on the surface of a steel component and using it to carry out the treatment on the auxiliary steel structure of a concrete bridge. The method of surface treatment. Background technique [0002] In the anti-corrosion treatment of the auxiliary brackets of railway bridges in my country, especially the steel brackets with railings or pedestrian walks on both sides of concrete bridges, on-site paint coating is generally used for anti-corrosion. However, in actual use, repainting and maintenance are required every year, and the cost is relatively high. Especially after the opening to traffic, it is difficult to carry out on-site painting and maintenance operations on a large scale; in addition, as environmental prot...

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Problems solved by technology

However, in fact, since the zinc and aluminum in the protective layer prepared by this process are only in a pseudo-alloy state, its an

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