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Preparation and coating method of composite coating for cast iron valves

A composite coating and valve technology, which is applied in coatings, wax coatings, and devices for coating liquid on the surface, can solve the problems of poor wear resistance and heat resistance, and is easy to break, so as to improve wear resistance and heat resistance, uniform coating thickness, and extended application range

Active Publication Date: 2019-04-30
ANHUI TONGLING KELI VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the acid resistance, alkali resistance and salt resistance have been improved compared with the traditional process, the wear resistance and heat resistance are not good, and it is easily broken by impact.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: A composite coating for cast iron valves, which includes in parts by weight: 10 parts of silicon dioxide, 25 parts of polyethylene wax, 2 parts of silicon carbide, 4 parts of sodium stannate, 20 parts of Paraffin wax, 2 parts of titanium dioxide, 6 parts of rosin, 4 parts of zinc oxide, 12 parts of ceramic powder, and 3 parts of phenolic resin.

[0012] The preparation and coating method of composite coating for cast iron valves includes the following steps: (1) Preparation of mixture: 12 parts of ceramic powder, 6 parts of rosin and 4 parts of zinc oxide are mixed and uniformly ground into powder Preheat the mixture to 200°C at a rate of 4°C / min and keep it for 10 minutes, then stir at 2MPa at a speed of 80r / min for 20 minutes to form a mixture; (2). Preparation of rubber compound: 3 parts of phenolic resin, 10 parts of silicon dioxide, 25 parts of polyethylene wax and 2 parts of silicon carbide are mixed and evenly ground into a powdery mixture, which is mixed...

Embodiment 2

[0013] Example 2: A composite coating for cast iron valves, which includes in parts by weight: 15 parts of silicon dioxide, 30 parts of polyethylene wax, 3 parts of silicon carbide, 6 parts of sodium stannate, 25 parts of Paraffin wax, 4 parts of titanium dioxide, 8 parts of rosin, 6 parts of zinc oxide, 14 parts of ceramic powder, and 5 parts of phenolic resin.

[0014] The preparation and coating method of composite coating for cast iron valves includes the following steps: (1) Preparation of mixture: 14 parts of ceramic powder, 8 parts of rosin and 6 parts of zinc oxide are mixed and uniformly ground into powder Preheat the mixture to 225°C at a speed of 5°C / min, keep it for 15min, then stir at 3MPa at a speed of 90r / min for 25min to form a mixture; (2) Preparation of rubber compound: 5 parts of phenolic resin, 15 parts of silicon dioxide, 30 parts of polyethylene wax and 3 parts of silicon carbide are mixed and evenly ground into a powdery mixture, which is mixed in an intern...

Embodiment 3

[0015] Example 3: A composite coating for cast iron valves, which includes in parts by weight: 20 parts of silicon dioxide, 35 parts of polyethylene wax, 4 parts of silicon carbide, 8 parts of sodium stannate, 30 parts of Paraffin wax, 6 parts of titanium dioxide, 10 parts of rosin, 8 parts of zinc oxide, 16 parts of ceramic powder and 7 parts of phenolic resin.

[0016] The preparation and coating method of composite coating for cast iron valves includes the following steps: (1) Preparation of mixture: 16 parts of ceramic powder, 10 parts of rosin and 8 parts of zinc oxide are mixed and uniformly ground into powder Preheat the mixture to 250°C at a speed of 6°C / min, keep it for 20 minutes, and then stir at 4MPa at a speed of 100r / min for 30 minutes to form a mixture; (2). Preparation of rubber compound: 7 parts of phenolic resin, 20 parts of silicon dioxide, 35 parts of polyethylene wax and 4 parts of silicon carbide are mixed and evenly ground into a powdery mixture, which is m...

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PUM

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Abstract

The invention discloses a composite coating for cast iron valves and a preparation and coating method thereof. The composite coating comprises the following components in parts by weight: 10 to 20 parts of silicon dioxide, 25 to 35 parts of polyethylene wax, 2 to 4 parts of silicon carbide, 4 to 8 parts of sodium stannate, 20 to 30 parts of paraffin, 2 to 6 parts of titanium dioxide, 6 to 10 parts of rosin, 4 to 8 parts of zinc oxide, 12 to 16 parts of ceramic powder, and 3 to 7 parts f phenolic resin. The coating has the advantages that ceramic powder is used to replace epoxy resin and is taken as the main component of the coating, the wear resistant performance and heat resistant performance of the coating are both enhanced therefore, moreover, the coating has certain toughness and is capable of resisting strong impact and preventing being broken, and thus the application range of cast iron valves is enlarged.

Description

Technical field [0001] The invention relates to a valve inner surface treatment process, in particular to a preparation and coating method of a composite coating for cast iron valves. Background technique [0002] A valve (famen) is a control component in a fluid conveying system, which has the functions of cut-off, regulation, diversion, prevention of reverse flow, stabilization, diversion or overflow and pressure relief. Valves used in fluid control systems, ranging from the simplest shut-off valve to the various valves used in extremely complex automatic control systems, have a wide variety and specifications. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. Valves are also divided into cast iron valves, cast steel valves, stainless steel valves (201, 304, 316, etc.), chromium molybdenum steel valves, chromium molybdenum vanadium steel valves, duplex steel valves...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D123/06C09D191/06C09D7/61B05D7/14B05D7/24B05D3/02
CPCB05D3/0254B05D7/14B05D7/24B05D2202/10B05D2518/00B05D2601/20B05D2601/24C08L2205/035C09D7/61C09D123/06C08L91/06C08L93/04C08L61/06C08K3/36C08K3/34C08K3/24C08K2003/2241C08K2003/2296B05D2401/40
Inventor 汪军平
Owner ANHUI TONGLING KELI VALVE