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

Nickel protective agent and preparation method and application method thereof

A technology of protective agent and pore filling agent, applied in the direction of metal material coating process, etc., can solve the problems of poor resistance of protective layer and difficult to reach 15 hours.

Active Publication Date: 2018-11-13
BYD CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing chromium-free formula, the protective layer obtained has poor tolerance. In the salt spray test, the test time is about 10 hours, and it is difficult to reach more than 15 hours

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0016] The present invention also provides a method for preparing a nickel protective agent, comprising: mixing ethylene glycol with water to obtain an aqueous solution of ethylene glycol; adding an antioxidant and a silane coupling agent to the aqueous ethylene glycol solution, and stirring until dissolved; The antioxidant is one or more of N-methylmorpholine, allantoin and ascorbic acid.

[0017] According to the preparation method of the nickel protective agent provided by the present invention, preferably, a hardness regulator and a pore filling agent are added to the aqueous ethylene glycol solution.

[0018] The present invention also provides a method for using the nickel protectant, comprising: immersing the base material in the above nickel protectant. Preferably, the soaking time is 5-15 minutes, and the soaking temperature is 20-50°C.

[0019] According to the method for using the nickel protective agent provided by the present invention, preferably, the substrate ...

Embodiment 1

[0023] Preparation of nickel protective agent: add ethylene glycol to water, mix to obtain ethylene glycol aqueous solution; add N-methylmorpholine, allantoin, silane coupling agent, hardness regulator and pore filling agent to ethylene glycol aqueous solution , to obtain a nickel protective agent after stirring evenly. Among them, the content of ethylene glycol is 100g / L, N-methylmorpholine 2g / L, allantoin 1g / L, silane coupling agent (model KH-560) 8g / L, hardness modifier (sodium citrate ) content of 5g / L and pore filling agent (nano-titanium dioxide, D 50 particle size 20-50nm) content is 0.3g / L.

Embodiment 2

[0025] Preparation of nickel protective agent: add ethylene glycol to water, mix to obtain ethylene glycol aqueous solution; add N-methylmorpholine, allantoin, silane coupling agent, hardness regulator and pore filling agent to ethylene glycol aqueous solution , to obtain a nickel protective agent after stirring evenly. Among them, the content of ethylene glycol is 20g / L, N-methylmorpholine 0.1g / L, allantoin 0.1g / L, silane coupling agent (model KH-560) 1g / L, hardness regulator (lemon Sodium acid) content of 1g / L and pore filling agent (nano-titanium dioxide, D 50 particle size 20-50nm) content is 0.1g / L.

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
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a nickel protective agent. The nickel protective agent is an aqueous solution containing an antioxidant, a silane coupling agent and ethanediol, wherein the antioxidant is oneor more of N-methylmorpholine, allantoin and ascorbic acid. The invention further provides a preparation method and application method of the nickel protective agent.

Description

technical field [0001] The invention relates to a nickel protective agent, a preparation method and a use method, and belongs to the technical field of material surface treatment. Background technique [0002] In modern electroplating process, nickel plating technology is widely used. However, because the nickel layer, especially the chemical nickel layer, has large pores, it is prone to potential corrosion and oxidative discoloration, and its salt spray resistance is often poor. Therefore, it is often necessary to further protect the nickel layer such as passivation. [0003] Hexavalent chromium passivators are commonly used in the prior art. The nickel layer passivated by hexavalent chromium has better tolerance, and the salt spray test effect can reach more than 24h, but the passivation protection effect of hexavalent chromium passivator is greatly affected by the content of hexavalent chromium, which makes the passivation effect unstable. At the same time, hexavalent ...

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): C23C22/05
CPCC23C22/05C23C2222/20
Inventor 韦家亮
Owner BYD CO LTD