Preparation method of heat exchanger surface corrosion-preventing and fouling-preventing nano-grade multi-element composite coating

A multi-component composite and heat exchanger technology, applied in coatings, electrolytic coatings, etc., can solve the problems of patent disclosure and literature reports, etc., and achieve good anti-corrosion and anti-fouling performance, small linear expansion coefficient, easy The effect of the operation

Inactive Publication Date: 2013-04-03
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In a word, there are no patent publications and literature reports on the patents closely related to the present invention in many aspects such as technology and composition.

Method used

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  • Preparation method of heat exchanger surface corrosion-preventing and fouling-preventing nano-grade multi-element composite coating
  • Preparation method of heat exchanger surface corrosion-preventing and fouling-preventing nano-grade multi-element composite coating
  • Preparation method of heat exchanger surface corrosion-preventing and fouling-preventing nano-grade multi-element composite coating

Examples

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Effect test

Embodiment Construction

[0032] 1. Example 1

[0033] The carbon steel heat exchanger plate sample was used as the cathode material in the test, and the electrolytic nickel plate and the pure iron plate were used as the anode material. The area of ​​the electrolytic nickel plate was 150mm×100mm; The electroplating power supply adopts double-pulse numerical control controllable power supply. The nano-SiC particles are firstly washed with alkali for 10 minutes, then acid washed for 10 minutes, and then placed in the plating solution for ultrasonic dispersion for 6-8 hours. A continuous cathode moving device and continuous slow mechanical stirring are used in the pulse plating process. The carbon steel heat exchanger plate sample was subjected to pulse electrodeposition of Ni-20%Fe-SiC alloy under the conditions of continuous cathode movement and continuous slow mechanical stirring after rust removal, oil removal and surface activation treatment. See Table 1 for the plating conditions. The microscopic...

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Abstract

The invention provides a method for preparing a corrosion-preventing and fouling-preventing nano-grade multi-element composite coating through pulse electro-deposition. An electro-deposition device with stirring, temperature-control and cathode moving devices are adopted. 5-15g / l of pretreated nano-particles a is added; 3-5g / l of an additive b and 0.25-1g / l of an additive c are added; and the nano-grade multi-element composite coating material is obtained under process parameters of an electroplating solution temperature of 45-60 DEG C, a pH value of 3-3.8, and a cathode current density of 2-10A / dm<2>. The preparation method provided by the invention is simple and easy to operate. The product has the advantages of stable product quality, corrosion resistance, fouling resistance, low environment pollution, low production cost, and the like.

Description

technical field [0001] The invention relates to a method for preparing a nano-multiple composite coating, in particular to a method for preparing an anti-corrosion and non-scaling nano-multiple composite coating by pulse electrodeposition on the surface of a heat exchanger. Background technique [0002] The materials used in gas-liquid heat exchangers and liquid-liquid heat exchangers should not only have good heat transfer properties, but also be heat-resistant and corrosion-resistant (including rust-proof), as well as have excellent processability and low prices. At present, such heat exchangers at home and abroad are made of metal materials, and austenitic (Cr18Ni9 type) stainless steel (good heat resistance, corrosion resistance, and formability) are used more often. There are also copper alloys such as H68 ordinary brass (good heat transfer), but there are problems of poor corrosion resistance and scale accumulation in use, which seriously affects the service life of th...

Claims

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Application Information

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IPC IPC(8): C25D5/18C25D5/22C25D5/20C25D15/00
Inventor 李雪松吴化杨友杨悦
Owner CHANGCHUN UNIV OF TECH
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