Super-thick metal anticorrosive coat and preparation technology thereof

Abstract

The invention relates to metal surface anticorrosion and long-acting heavy duty anticorrosion, and discloses a super-thick metal anticorrosive coat and a preparation technology thereof. The super-thick metal anticorrosive coat comprises a metal substrate (2), a metal surface anchor hook layer (1) and an anticorrosive metal layer (3), the toughness of the surface of the metal substrate (2) is 150-1400mum, and the metal substrate (2) has an embedded anchoring connection with the anticorrosive metal layer (3) through the metal surface anchor hook layer (1). The preparation technology comprises the following steps: 1, preparing anchor grains having a roughness of 150-1400mum on the surface of the metal substrate (2); 2, pressuring the anchor grains on the metal substrate (2) to form the metal surface anchor hook layer (1); and 3, preparing the anticorrosive metal layer (3). The arrangement of the metal surface anchor hook layer in the invention obviously reinforces a mechanical binding force between the metal surface anchor hook layer and the anticorrosive metal layer, and provides a necessary condition for the preparation of thicker coats.

Description

technical field [0001] The invention relates to metal surface anticorrosion and long-acting heavy anticorrosion, in particular to an ultra-thick metal anticorrosion coating and a preparation process. Background technique [0002] Traditional metal anti-corrosion coatings, due to the limitation of adhesion and the influence of the difference in the linear expansion coefficient of the material itself, except for the arc thermal spraying with large porosity and relatively low coating quality, very thick coatings cannot be prepared . For example, it is difficult to prepare hot-dip galvanized zinc layer with a thickness of more than 150 μm. Under the conditions of traditional technology, excessive thickness will cause defects such as delamination, cracking, and warping, which will affect the anti-corrosion effect. Regardless of the mechanism of isolated anti-corrosion or self-consumption reaction anti-corrosion, especially the self-consumption reaction anti-corrosion, the thickn...

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Problems solved by technology

[0003] The present invention aims at the shortcomings of the metal anti-corrosion coating in the prior art, such as being difficult to prepare a very thick coating due to the limitation of adhesion and the influence of the difference in the coefficient of linear expansion of the material itself, and provides a method for coating on the surface of a metal substrate. Set the metal substrate anchor layer, the metal substrate is embedded and anchored with the anti-corrosion metal layer through the metal substrate anchor layer, and the ultra-thick metal anti-corrosion coating with a coating thickness of more than 150 μm and its preparation process

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