Preparation process of high-strength anticorrosive coating at corner

Abstract

The invention discloses a preparation process of a high-strength anticorrosive coating at a corner, and belongs to the field of valve corrosion prevention. The preparation process of the high-strengthanticorrosive coating at the corner is characterized in that nano ceramic particles can be adhered to surfaces of quicksand repairing microspheres through process of adhering, condensing, melting andre-condensing water vapor on the surfaces of the quicksand repairing microspheres, so that the quicksand repairing microspheres can carry the nano ceramic particles to be sealed in the anticorrosivecoating, then a valve is heated, the nano ceramic particles are separated from the quicksand repairing microspheres and flow towards micro-gaps generated by bubbles nearby the corner, the influence ofthe internal gaps of the anticorrosive coating on the strength of the anticorrosive coating is remarkably reduced, the strength of the anticorrosive coating formed at the final corner is effectivelyimproved, the peeling probability of the corner is reduced, meanwhile, when being impacted, the quicksand repairing microspheres are broken, the ceramic adhesive in the quicksand repairing microspheres overflows and extends towards the periphery along the liquid guide fluff, surrounding nano ceramic particles and micro cracks generated by impact are bonded together, and the internal self-repairingeffect is achieved.

Description

technical field [0001] The invention relates to the field of valve anti-corrosion, and more specifically relates to a preparation process of a high-strength anti-corrosion coating at a corner. Background technique [0002] The valve is a control component in the pipeline fluid conveying system, which is used to change the passage section and the flow direction of the medium, and has the functions of diversion, cut-off, throttling, check, diversion or overflow and pressure relief. Valves used for fluid control range from the simplest shut-off valve to various valves used in extremely complex automatic control systems. Valves for industrial pipelines. It can be used to control the flow of various types of fluids such as water, steam, oil, gas, mud, various corrosive media, liquid metals and radioactive fluids. The working pressure of the valve can be from 0.0013MPa to 1000MPa ultra-high pressure, and the working temperature can be c-270°C ultra-low temperature to 1430°C high...

AI Technical Summary

Problems solved by technology

[0004] Since the valve is generally exposed in the environment and will be exposed to various liquids at the same time, in order to ensure its service life, an anti-corrosion layer is usually sprayed on its surface, but in the actual spraying of the anti-corrosion layer, at the corner where the two surfaces turn, due to unevenness As a result, certain air bubbles are easy to be generated. After drying to form an anti-corrosion layer, the strength of the anti-corrosion layer at this place is relatively low compared to the smooth part, so that in the actual use process, the corners are prone to peeling and falling off, making it lower than the protection of the valve. The effect is greatly reduced

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