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Preparation method of chemical material slurry plunger pump with composite coating, and product thereof

A composite coating and plunger pump technology, applied in the field of plunger pumps, can solve the problems of lack of corrosion resistance and wear resistance, corrosion strength enhancement, etc.

Active Publication Date: 2020-10-27
德清创智科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, CL and SO in the slurry 4 The corrosion strength of F ions is also greatly enhanced under high temperature conditions, and all kinds of high-alloy stainless steels do not have sufficient corrosion resistance and wear resistance

Method used

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  • Preparation method of chemical material slurry plunger pump with composite coating, and product thereof
  • Preparation method of chemical material slurry plunger pump with composite coating, and product thereof
  • Preparation method of chemical material slurry plunger pump with composite coating, and product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] A chemical slurry plunger pump with a ceramic coating plunger, the process of which is:

[0065] 1. The part where the plunger substrate coating is located is undercut, leaving a coating thickness of 0.3mm, and the connection between the edge of the coating and the substrate should be chamfered at 45 degrees.

[0066] 2. The substrate is degreased and baked with an organic solvent. Sand blasting with No. 24 brown corundum sand, and the non-coating area is protected with a fixture. Sandblasting compressed air pressure 5kg, distance 15cm, sandblasting angle 80°. After sandblasting, the surface of the substrate is evenly roughened, reaching Sa3 level.

[0067] 3. After preheating the substrate to 100°C, use the SG100 spray gun 730 nozzle of the Thermach company in the United States to spray the nickel-chromium underlayer coating with a spraying current of 400A, a voltage of 38V, and a coating thickness of 0.1mm.

[0068] 4. Use the SG100 spray gun 720 subsonic nozzle of...

Embodiment 2

[0073] A preparation method of a chemical slurry plunger pump with a ceramic coating plunger, comprising the following preparation steps:

[0074] (1) The part where the plunger substrate coating is located is cut down to reserve a coating thickness of 0.25 mm, and the connection between the coating edge and the substrate is chamfered at 40 degrees;

[0075] (2) The substrate is degreased and baked with an organic solvent; then sandblasting, the compressed air pressure of sandblasting is 6kg, the distance of sandblasting is 12cm, and the angle of sandblasting is 85°; the non-coating area is protected by a fixture; thus the roughness can be increased ;

[0076] (3) The substrate is preheated to 90°C, sprayed with nickel-chromium primer, spraying current 350-450A, voltage 35V, coating thickness 0.08mm;

[0077] (4) Spraying chromium oxide coating, spraying current 500A, voltage 40V, coating thickness 0.2mm;

[0078] (5) Vacuum impregnation sealing is carried out to the coating...

Embodiment 3

[0082] A preparation method of a chemical slurry plunger pump with a ceramic coating plunger, comprising the following preparation steps:

[0083] (1) The part where the plunger substrate coating is located is cut down to reserve a coating thickness of 0.25-0.35mm, and the connection between the edge of the coating and the substrate is chamfered at 40-50 degrees;

[0084] (2) The substrate is degreased and baked with an organic solvent; then sandblasting is performed, with a compressed air pressure of 4kg, a sandblasting distance of 8cm, and a sandblasting angle of 75°; the non-coated area is protected by a fixture;

[0085] (3) The substrate is preheated to 110°C, and the nickel-chromium primer layer is sprayed, the spraying current is 450A, the voltage is 40V, and the coating thickness is 0.12mm;

[0086] (4) Spraying chromium oxide coating, spraying current 600A, voltage 50V, coating thickness 0.4mm;

[0087] (5) Vacuum impregnation sealing is carried out to the coating, t...

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Abstract

The invention relates to the technical field of a plunger pump, and particularly relates to a preparation method of a chemical material slurry plunger pump with composite coating, and a product thereof. The preparation method comprises the following preparation steps: performing undercutting for a part where coating of a plunger base body is, thereby reserving 0.25-0.35mm coating thickness, chamfering 40-50 degrees for a connection part between a coating edge and the base body; executing organic solvent degreasing and baking for the base body; then, performing sand blasting, using a clamp forprotecting a non-coating area; preheating the base body to 90-110 DEG C, spraying a nickel chrome bottom layer coating, wherein spraying current is 350-450A, voltage is 35-40V, and coating thickness is 0.08-0.12mm; spraying a chromic oxide coating, wherein spraying current is 500-600A, voltage is 40-50V, and coating thickness is 0.2-0.4mm; performing vacuum impregnation hole sealing, wherein impregnation time is 10-20 minutes, heating curing is executed after surface drying, and curing time is 1.5-2.5 hours; and using a grinding machine to perform grinding processing for the plunger, wherein grinding processing comprises three working procedures including coarse grinding, fine grinding and polishing. The chemical material slurry plunger pump with composite coating, prepared by the method of the invention has high corrosion resistance and abrasion resistance.

Description

technical field [0001] The invention relates to the technical field of plunger pumps, in particular to a method for preparing a chemical slurry plunger pump with a composite coating and its products. Background technique [0002] Due to the complexity and particularity of the process in modern chemical production, the material of the pump needs to meet the requirements of strength, temperature resistance, wear resistance, corrosion resistance, etc., and it is often more prominent to meet its wear resistance and resistance under high temperature conditions. corrosive. Although stainless steel is corrosion-resistant in most cases, it will not work in strong corrosive solutions such as sulfuric acid, hydrochloric acid, and hydrofluoric acid. [0003] Under the production conditions of the wet-process phosphate compound fertilizer industry, the working medium of the concentrated phosphoric acid slurry pump in the phosphoric acid and ammonium phosphate plant is phosphoric acid. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/134B24B1/00B24B29/02C23C4/08C23C4/11C23C4/18F04B15/04F04B53/14
CPCC23C4/134C23C4/11C23C4/08C23C4/18F04B15/04F04B53/14F04B53/143B24B29/005B24B29/02B24B1/00Y02P20/10
Inventor 陈峰沈健健吴立军
Owner 德清创智科技股份有限公司
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