Metal surface multilayer nickel plating process with excellent corrosion resistance

Abstract

The invention relates to a metal surface multilayer nickel plating process with excellent corrosion resistance. The manufacture process comprises the following steps of: plating a semi-bright layer firstly, plating a high-sulfur layer secondly, plating a bright layer thirdly and plating a nickel sealing layer fourthly from inside to outside. By adopting the technical scheme, the invention has the advantages of improving plating covering effect of a low current area, increasing the potential difference among nickel layers, protecting a matrix, slowing down the corrosion and greatly strengthening the corrosion resistance of the matrix by adopting the low concentration multilayer nickel (semi-bright nickel, high-sulfur nickel, bright nickel and nickel sealing) plus chrome plating process in an electroplating process, and by adopting the semi-bright nickel plating at the bottom layer, excellent leveling capability and scalability can be obtained, a plating solution is easy to control, harmful products cannot be produced after long-time operation, and the plating contains no sulfur and has higher corrosion resistance.

Description

technical field

[0001] The invention relates to a metal surface electroplating treatment technology, in particular to a metal surface multilayer nickel plating process with excellent anticorrosion performance. Background technique

[0002] With the development of technology and the progress of society, the requirements for the appearance of products are constantly improving. As a traditional surface treatment process, electroplating process has been widely used in many fields. The currently used electroplating process mainly has two functions; one is decorative electroplating with the main purpose of appearance decoration; the other is functional electroplating with anti-corrosion as the main purpose. In some industries, the plated parts are also required to have the above two functions at the same time, especially the automobile and motorcycle industries. Due to the use characteristics of the products, the above-mentioned products should be exposed to the outdoors for a l...

Examples

Embodiment 1

[0010] A kind of metal surface multi-layer nickel plating process with excellent anti-corrosion performance, its manufacturing process includes the following steps: from the inside to the outside, the first is semi-bright layer plating, the second is high-sulfur layer plating, and the third is bright layer plating The fourth is nickel sealing layer plating, and the fifth is decorative layer plating. The composition and proportion of each plating solution are:

[0011] A) Semi-bright layer---nickel sulfate 150g / L, nickel chloride 35g / L, boric acid 50g / L, semi-bright nickel primary brightener 3.0ml / L, semi-bright nickel secondary brightener 1.0ml / L, electric potential The difference adjusting agent is 0.8ml / L, the wetting agent is 2ml / L, and the rest is solvent water.

[0012] Description of the components of the plating solution:

[0013] 1. Nickel sulfate: Nickel sulfate and nickel chloride are Ni in the plating solution 2+ Its content is maintained by the rapid dissolution ...

Embodiment 2

[0052] A kind of metal surface multilayer nickel-plating process with excellent anticorrosion performance with embodiment one, its difference is: each coating bath composition and ratio are:

[0053] A) Semi-bright layer---nickel sulfate 165g / L, nickel chloride 40g / L, boric acid 35g / L, semi-bright nickel primary brightener 5.0ml / L, semi-bright nickel secondary brightener 0.3ml / L, electric potential The difference adjustment agent is 1.0ml / L, the wetting agent is 3.0ml / L, and the rest is solvent water.

[0054] B) High-sulfur layer --- nickel sulfate 150g / L, nickel chloride 45g / L, boric acid 40g / L, high-sulfur nickel brightener 15ml / L, wetting agent 3ml / L, and the rest is solvent water.

[0055] C) Bright layer---nickel sulfate 150g / L, nickel chloride 50g / L, boric acid 35g / L, bright nickel softener (also called moving agent) 12ml / L, bright nickel main light agent 0.5ml / L, The wetting agent is 2.0ml / L, and the rest is solvent water.

[0056] D) Nickel sealing layer---nickel su...

Embodiment 3

[0059] A kind of metal surface multilayer nickel-plating process with excellent anticorrosion performance with embodiment one, its difference is: each coating bath composition and ratio are:

[0060] A) Semi-bright layer---nickel sulfate 180g / L, nickel chloride 45g / L, boric acid 42g / L, semi-bright nickel primary brightener 7.0ml / L, semi-bright nickel secondary brightener 0.65ml / L, electric potential The difference adjusting agent is 1.2ml / L, the wetting agent is 2.5ml / L, and the rest is solvent water.

[0061] B) High-sulfur layer --- nickel sulfate 165g / L, nickel chloride 40g / L, boric acid 37g / L, high-sulfur nickel brightener 20ml / L, wetting agent 2ml / L, and the rest is solvent water.

[0062] C) Bright layer---nickel sulfate 180g / L, nickel chloride 45g / L, boric acid 42g / L, bright nickel softener (also called moving agent) 8ml / L, bright nickel main light agent 0.7ml / L, The wetting agent is 3ml / L, and the rest is solvent water.

[0063] D) Nickel sealing layer---nickel sulfa...

technical field

[0001] The invention relates to a metal surface electroplating treatment technology, in particular to a metal surface multilayer nickel plating process with excellent anticorrosion performance. Background technique

[0002] With the development of technology and the progress of society, the requirements for the appearance of products are constantly improving. As a traditional surface treatment process, electroplating process has been widely used in many fields. The currently used electroplating process mainly has two functions; one is decorative electroplating with the main purpose of appearance decoration; the other is functional electroplating with anti-corrosion as the main purpose. In some industries, the plated parts are also required to have the above two functions at the same time, especially the automobile and motorcycle industries. Due to the use characteristics of the products, the above-mentioned products should be exposed to the outdoors for a l...

Examples

Embodiment 1

[0010] A kind of metal surface multi-layer nickel plating process with excellent anti-corrosion performance, its manufacturing process includes the following steps: from the inside to the outside, the first is semi-bright layer plating, the second is high-sulfur layer plating, and the third is bright layer plating The fourth is nickel sealing layer plating, and the fifth is decorative layer plating. The composition and proportion of each plating solution are:

[0011] A) Semi-bright layer---nickel sulfate 150g / L, nickel chloride 35g / L, boric acid 50g / L, semi-bright nickel primary brightener 3.0ml / L, semi-bright nickel secondary brightener 1.0ml / L, electric potential The difference adjusting agent is 0.8ml / L, the wetting agent is 2ml / L, and the rest is solvent water.

[0012] Description of the components of the plating solution:

[0013] 1. Nickel sulfate: Nickel sulfate and nickel chloride are Ni in the plating solution 2+ Its content is maintained by the rapid dissolution ...

Embodiment 2

[0052] A kind of metal surface multilayer nickel-plating process with excellent anticorrosion performance with embodiment one, its difference is: each coating bath composition and ratio are:

[0053] A) Semi-bright layer---nickel sulfate 165g / L, nickel chloride 40g / L, boric acid 35g / L, semi-bright nickel primary brightener 5.0ml / L, semi-bright nickel secondary brightener 0.3ml / L, electric potential The difference adjustment agent is 1.0ml / L, the wetting agent is 3.0ml / L, and the rest is solvent water.

[0054] B) High-sulfur layer --- nickel sulfate 150g / L, nickel chloride 45g / L, boric acid 40g / L, high-sulfur nickel brightener 15ml / L, wetting agent 3ml / L, and the rest is solvent water.

[0055] C) Bright layer---nickel sulfate 150g / L, nickel chloride 50g / L, boric acid 35g / L, bright nickel softener (also called moving agent) 12ml / L, bright nickel main light agent 0.5ml / L, The wetting agent is 2.0ml / L, and the rest is solvent water.

[0056] D) Nickel sealing layer---nickel su...

Embodiment 3

[0059] A kind of metal surface multilayer nickel-plating process with excellent anticorrosion performance with embodiment one, its difference is: each coating bath composition and ratio are:

[0060] A) Semi-bright layer---nickel sulfate 180g / L, nickel chloride 45g / L, boric acid 42g / L, semi-bright nickel primary brightener 7.0ml / L, semi-bright nickel secondary brightener 0.65ml / L, electric potential The difference adjusting agent is 1.2ml / L, the wetting agent is 2.5ml / L, and the rest is solvent water.

[0061] B) High-sulfur layer --- nickel sulfate 165g / L, nickel chloride 40g / L, boric acid 37g / L, high-sulfur nickel brightener 20ml / L, wetting agent 2ml / L, and the rest is solvent water.

[0062] C) Bright layer---nickel sulfate 180g / L, nickel chloride 45g / L, boric acid 42g / L, bright nickel softener (also called moving agent) 8ml / L, bright nickel main light agent 0.7ml / L, The wetting agent is 3ml / L, and the rest is solvent water.

[0063] D) Nickel sealing layer---nickel sulfa...