CN104831324A

CN104831324A - Preparation method of Ni-W/SiC composite coating

Info

Publication number: CN104831324A
Application number: CN201510215097.2A
Authority: CN
Inventors: 苏长伟; 白阳; 叶猛超; 侯健萍; 郭俊明; 袁明龙
Original assignee: Yunnan Minzu University
Current assignee: Yunnan Minzu University
Priority date: 2015-04-30
Filing date: 2015-04-30
Publication date: 2015-08-12

Abstract

The invention discloses a preparation method of a Ni-W/SiC composition coating, wherein the content of SiC is in a range of 10-35 wt%. The invention further discloses a preparation technology of the Ni-W/SiC composite coating, including the concentration of the electrolyte and electroplating parameters. The composite coating is widely used in the fields of oil exploitation machinery, automobile, precision manufacture, aviation, and the like, especially the machinery field.

Description

A kind of Ni-W/SiC composite deposite preparation method

Technical field

The invention belongs to composite plating technology field, be specifically related to a kind of Ni-W/SiC composite plating process.

Background technology

Ni-W alloy has excellent solidity to corrosion, good wear resistance.But wear resistance is obviously not enough under certain environment, as there is mud gravel when oil well is drilled, be namely easy to abrasion of particles occurs.In plating solution, add hard particles as SiC, obtain composite deposite, the wear resistance of coating can be significantly improved; As obtained Ni/SiC composite deposite in patent (publication number CN1227282A, CN1683600A and CN101302643A), substantially increase the wear resistance of nickel coating.

SiC is insoluble solid particle, and itself electromigration can not occur under electric field action on electrode without electric charge, only under agitation be diffused into electrode surface, with during electrode collide just likely with coating generation compound, so SiC is not high at the content of metal plating, be generally no more than 10%.

Summary of the invention

Object of the present invention is intended to prepare the Ni-W/SiC coating with excellent corrosion resistance and wear resistance, and its SiC content is greater than 10%; To be with a wide range of applications at machinery especially oil recovery machiner, automobile, precision manufactureing and aerospace field.

The technical scheme realizing the object of the invention is:

The composite plating solution selected comprises: single nickel salt 10 ~ 60 g/L, sodium wolframate 10 ~ 60 g/L, Trisodium Citrate 10-100 g/L and SiC micron particle 1 ~ 30 g/L.Change SiC micron particle content, also can add ammonium sulfate, and change its concentration all controllable SiC concentration in coating, 10 ~ 35 Wt%.

The electroplating technology selected: the pH value of electroplate liquid is 6 ~ 8, the temperature of electroplate liquid is 50 ~ 90 DEG C, and current density is 1 ~ 10 A/dm ².

compared with prior art, the present invention has following outstanding advantages:

The present invention prepares Ni-W/SiC composite deposite and has different solidity to corrosion and wear resistance; In coating, SiC content is up to 10 ~ 35 Wt%;

Electroplate liquid proposed by the invention has easy to maintenance, and be easy to the feature regenerated, use cost is low.

Accompanying drawing explanation

Fig. 1 is the SEM picture of different ammonium sulfate concentrations gained Ni-W/SiC composite deposite, (a) 0 g/L; (b) 10 g/L; (c) 50 g/L.

Embodiment

Embodiment 1

First take single nickel salt 10 g, sodium wolframate 60 g, ammonium citrate 70 g, put into 1 L beaker, then add deionized water to 4/5 of volume, heated and stirred is dissolved, and finally adds 5g SiC microparticle, stirs 2h.Sodium hydrate regulator solution pH is utilized to be 7.The temperature of electroplate liquid controls at 70 DEG C, and current density is 2.5 A/dm ², electroplating time 1h, obtains Ni-W/SiC composite deposite, and its component be 24.69, Ni% is 36.91, W% in the No.1 in table 1, SiC% is 38.41.Apparent form is shown in Fig. 1 (a).

the component of table 1. Ni-W/SiC composite deposite.

Embodiment 3

On the basis of embodiment 1, increase the concentration of single nickel salt to 60g/L, reduce concentration to 10 g/L of sodium wolframate, in gained Ni-W/SiC composite deposite, SiC content is 25%.With compared with embodiment 1, the amount of known change single nickel salt and sodium wolframate, SiC content is substantially constant.

Embodiment 2

The basis of embodiment 1 adds ammonium sulfate 5-50g, and in table 1, also can obtain Ni-W/SiC composite deposite, its component is in table 1.As known from Table 1, in Ni-W/SiC composite deposite the content of SiC between 10 ~ 35%.

Claims

1. a Ni-W/SiC composite deposite preparation method, is characterized in that: adopt composite plating technology to prepare Ni-W/SiC composite deposite; The composite plating solution selected comprises: single nickel salt 10 ~ 60 g/L, sodium wolframate 10 ~ 60 g/L, Trisodium Citrate 10-100 g/L, ammonium sulfate 1-50 g/L and SiC micron particle 1 ~ 30 g/L; The electroplating technology selected: the pH value of electroplate liquid is 6 ~ 8, the temperature of electroplate liquid is 50 ~ 90 DEG C, and current density is 1 ~ 10 A/dm ².

2. a kind of Ni-W/SiC composite deposite preparation method according to claim 1, is characterized in that: in Ni-W/SiC composite deposite, the content of SiC is at 10 ~ 35 Wt%.