Unlock instant, AI-driven research and patent intelligence for your innovation.

Coating material with anti-corrosion and anti-wear property

A technology of coating material and base material, applied in the direction of coating, metal material coating process, welding/cutting medium/material, etc., can solve problems such as corrosion resistance reduction

Inactive Publication Date: 2003-09-10
EBARA CORP
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the portion of the substrate material that is in contact with the coating is less corrosion resistant than the substrate material itself

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Coating material with anti-corrosion and anti-wear property
  • Coating material with anti-corrosion and anti-wear property
  • Coating material with anti-corrosion and anti-wear property

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A cylinder assembly made of austenitic stainless steel SUS304 and having an outer diameter of 62 mm, an inner diameter of 51 mm and a length of 65 mm was prepared. Then, the outer circumferential surface of the cylinder assembly was coated with the first layer 5 having a thickness of 1.5 mm. The first layer 5 was formed of Ni-Cr-Mo alloy powder containing 30 wt % Cr, 10 wt % Mo, 1 wt % Si and the remainder consisting of Ni and inevitable impurities by plasma transfer arc welding. Then, the surface layer of the first layer 5 was cut to an outer diameter of 64.4 mm.

[0038] After that, the outer circumferential surface of the first layer 5 was coated with the second layer 6 having a thickness of 1.5 mm. The second layer 6 is made of a cobalt-based alloy (trade name STELLITE21 alloy, containing 26wt% Cr, 5.9wt% Mo, 3wt% Ni, 1.5wt% Fe, 1.1wt% Si, 0.25wt% C by plasma transfer arc welding and the remainder consisting of Co) powder formation of hard material. Then, the sur...

Embodiment 2

[0043] image 3 is a perspective view showing a movable vane made of austenitic stainless cast steel SCS16. exist image 3 , the movable vane 13 has a vane end comprising a region subjected to negative pressure. This negative pressure region of the blade may be damaged by cavitation corrosion caused by structural constraints under certain operating conditions. The material at site 14 was removed by 2 mm with a grinder. The surface of the abrasive site 14 was coated with a first layer having a thickness of 1.5 mm. The first layer was formed by plasma transfer arc welding from powder of Ni-Cr-Mo alloy containing 30 wt% Cr, 10 wt% Mo, 1 wt% Si and the remainder consisting of Ni and unavoidable impurities. Then, the surface layer of the first layer was removed by a cutting method to form a first layer having a thickness of 1 mm.

[0044] Then, the surface of the first layer was coated with a second layer having a thickness of 1.5 mm. The second layer was made of a cobalt-bas...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
lengthaaaaaaaaaa
lengthaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

A coating material has a first layer deposited on a base material and a second layer deposited on the first layer. The first layer is made of a Ni-base alloy or a Co-base alloy containing carbon as an unavoidable impurity. The second layer is made of a hard material containing carbide and a metal component. The first layer serves as a barrier for preventing carbon from being diffused from the second layer into the base material to prevent the base material from being carburized.

Description

technical field [0001] The present invention relates to pumps or other equipment for use in corrosive environments, such as seawater or chemicals, and more particularly, to a coating material with corrosion and wear resistance, suitable for use in parts of pumps that are Designed to operate under conditions of seawater mixed with soil or sand or cavitation-producing conditions, and relates to a method of preparing such a coating material having corrosion and abrasion resistance and having a coating with such a coating material the applied parts of the pump. Background technique [0002] Pumps designed to operate in corrosive environments such as seawater or chemicals have primary structural components, such as the casing and impeller, which are in contact with the liquid handled by the pump. In this case, most of these main structural components are made of stainless steel, which is highly corrosion-resistant and relatively inexpensive. However, the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/02B23K9/04B23K35/30C23C4/08C23C24/10C23C28/00C23C28/02C23C28/04
CPCC23C28/321Y10T428/12583Y10T428/12931F16C33/04Y10T428/12861Y10T428/12576Y10T428/12944C23C28/34F16C2204/52F16C33/125F16C2300/42
Inventor 杉山宪一川村聪中浜修平高山博和宫板松甫
Owner EBARA CORP