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

A composite coating and plunger pump technology, which is applied in the field of plunger pumps, can solve the problems of enhanced corrosion strength and lack of corrosion and wear resistance, and achieve good high temperature stability, reduce polishing time, and improve polishing efficiency.

Active Publication Date: 2022-08-09
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 slurry plunger pump with composite coating and product thereof
  • Preparation method of chemical slurry plunger pump with composite coating and product thereof
  • Preparation method of chemical 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 technological process of which is:

[0065] 1. The part of the plunger base coating is cut down to reserve a coating thickness of 0.3mm, and the connection between the edge of the coating and the base should be chamfered at 45 degrees.

[0066] 2. The substrate is degreasing and baking treatment by organic solvent. Sandblasted with 24-grit brown corundum grit, and protected the non-coated area with a jig. Sandblasting compressed air pressure 5kg, distance 15cm, sandblasting angle 80°. After sandblasting, the surface of the substrate is evenly roughened and reaches Sa3 level.

[0067] 3. The substrate is preheated to 100°C, and the nickel-chromium primer coating is sprayed with the SG100 spray gun 730 nozzle of the plasma equipment of Thermach Company in the United States, the spraying current is 400A, the voltage is 38V, and the coating thickness is 0.1mm.

[0068] 4. Use the plasma equipment SG100 sp...

Embodiment 2

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

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

[0075] (2) The substrate is degreased and baked by organic solvent; then sandblasted, the sandblasting compressed air pressure is 6kg, the sandblasting distance is 12cm, and the sandblasting angle 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, and the nickel-chromium bottom coating is sprayed with a spray current of 350-450A, a voltage of 35V, and a coating thickness of 0.08mm;

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

[0078] (5) vacuum dipping and sealing is performed on the coatin...

Embodiment 3

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

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

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

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

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

[0087] (5) vacuum dipping and sealing is carried out on the coating, the dipping time is 20 mi...

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Abstract

The invention relates to the technical field of plunger pumps, in particular to a preparation method of a chemical slurry plunger pump with a composite coating and its products. The preparation method includes the following preparation steps: cutting the part where the plunger base coating is located, reserving a coating thickness of 0.25-0.35 mm, and chamfering the edge of the coating and the base at 40-50 degrees; Degreasing and baking treatment; then sandblasting, and the non-coated area is protected with a jig; the substrate is preheated to 90‑110℃, sprayed with a nickel-chromium primer layer, spraying current 350‑450A, voltage 35‑40V, coating Thickness 0.08‑0.12mm; spray chromium oxide coating, spray current 500‑600A, voltage 40‑50V, coating thickness 0.2‑0.4mm; vacuum dipping and sealing the coating, dipping time 10‑20 minutes, surface dry Then heat and solidify, and the solidification time is 1.5-2.5 hours; the plunger is ground with a grinding machine, which is divided into three processes: rough grinding, fine grinding and polishing. The chemical slurry plunger pump with composite coating prepared by the method of the invention has strong corrosion resistance and wear resistance.

Description

technical field [0001] The invention relates to the technical field of plunger pumps, in particular to a preparation method of a chemical slurry plunger pump with a composite coating and its products. Background technique [0002] Due to the complexity and particularity of the modern chemical production process, the material of the pump needs to meet the requirements of strength, temperature resistance, wear resistance, corrosion resistance, etc., and often more prominent is the requirement 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 phosphorus compound fertilizer industry, the working medium of the concentrated phosphoric acid slurry pump in the phosphoric acid and ammonium phosphate plant is phosp...

Claims

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Application Information

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Patent Type & Authority Patents(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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