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Method for preparing corrosion resistant nickel/chromium plating steel belt

A corrosion-resistant and nickel-plating technology, applied in the field of preparation of high-performance corrosion-resistant nickel/chromium-plated steel strips, can solve the problems of reduced anti-corrosion performance, coating peeling, and high iron exposure rate, so as to improve the interface bonding force and increase anti-corrosion. performance, the effect of high mechanical properties

Inactive Publication Date: 2008-07-09
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing technology mainly focuses on the electrodeposition of thin nickel coatings, so that in some processes such as deep rolling and deep drawing, the substrate is easily exposed because the coating is too thin; and due to the interface between the thick coating and the substrate Thick coatings are prone to coating peeling and peeling due to excessive stress or improper heat treatment process
The diffusion layer of the existing nickel-clad steel strip is mainly Fe-Ni or Fe-Ni-C diffusion layer, which has a high iron exposure rate, which is easy to reduce the anti-corrosion performance, and the heat treatment process is not suitable, and it is easy to form a phase boundary at the interface. The interface mechanical properties of engineering materials are extremely harmful
In addition, a good matching relationship cannot be formed in terms of elongation, tensile strength, and hardness
The deficiency of these nickel-coated steel strips makes it not widely used in many fields.

Method used

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  • Method for preparing corrosion resistant nickel/chromium plating steel belt
  • Method for preparing corrosion resistant nickel/chromium plating steel belt
  • Method for preparing corrosion resistant nickel/chromium plating steel belt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1) Degreasing the cold-rolled low-carbon steel strip: degreasing is alkali washing and degreasing. , The composition of the chemical degreasing solution is sodium hydroxide 50g / L, sodium carbonate 35g / L, sodium phosphate 25g / L, solution temperature 70°C, current density 4A / dm 2 , Degreasing time 5min.

[0037] 2) Put the degreased cold-rolled low-carbon steel strip in the solution tank, and electroplate the chromium layer on the degreased cold-rolled low-carbon steel strip. The thickness of the chromium layer is controlled at 0.01-1 μm: the solution of the electroplated chromium layer The composition is anhydrous chromic anhydride 750g / L, hydrochloric acid 30ml / L, cathode current density 15A / dm 2 , bath temperature 35 ℃, immersion plating time 30s.

[0038] 3) Place the chrome-plated low-carbon steel strip in the solution tank, and electroplate a nickel layer on the chromium-plated low-carbon steel strip. The thickness of the nickel layer is controlled at 10-20 μm: th...

Embodiment 2

[0043] 1) Degreasing the cold-rolled low-carbon steel strip: degreasing is electrolytic degreasing, and electrolytic degreasing is to place the cold-rolled low-carbon steel strip in a solution tank for electrochemical degreasing to further remove the residual grease on the surface and electrolytic degreasing The best solution components are sodium hydroxide 60g / L, sodium carbonate 40g / L, sodium phosphate 45g / L, sodium silicate 4g / L, solution temperature 65°C, current density 6A / dm 2 , Degreasing time 6min.

[0044] 2) Put the degreased cold-rolled low-carbon steel strip in the solution tank, and electroplate the chromium layer on the degreased cold-rolled low-carbon steel strip. The thickness of the chromium layer is controlled at 0.01-1 μm: the solution of the electroplated chromium layer The composition is anhydrous chromic anhydride 800g / L, hydrochloric acid 40ml / L, cathode current density 25A / dm 2 , bath temperature 45 ℃, immersion plating time 3min.

[0045] 3) Place th...

Embodiment 3

[0050] The baseband is made of ordinary Q235 low-carbon steel commonly found in the market, with a thickness of 0.3mm and chemical composition: C 0.14-0.22%, Mn 0.30-0.65%, Si 0.3%, S 0.050%, P 0.045%.

[0051] 1) Degreasing the cold-rolled low-carbon steel strip; degreasing is alkali cleaning and electrolytic degreasing, and the alkali-cleaning degreasing is to place the cold-rolled low-carbon steel strip in a solution tank to remove the grease on the surface of the cold-rolled low-carbon steel strip, The composition of the chemical degreasing solution is sodium hydroxide 60g / L, sodium carbonate 40g / L, sodium phosphate 30g / L, solution temperature 75°C, current density 5A / dm 2 , Degreasing time 5min. Electrolytic degreasing is to place the cold-rolled low-carbon steel strip in a solution tank for electrochemical degreasing to further remove the residual grease on the surface. The components of the electrolytic degreasing solution are sodium hydroxide 50g / L, sodium carbonate 40...

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Abstract

A process for preparing corrosion-resisting nickelplate / chrome steel strip relates to a steel strip, which provides a process for preparing corrosion-resisting nickelplate / chrome steel strip which is formed by compactly combining electrodeposition nickel / chrome coat and low-carbon steel strip. The method comprises deoiling cold-rolled low-carbon steel strip, positioning the cold-rolled low-carbon steel strip which is deoiled in a liquid groove, electroplating chrome layer on the cold-rolled low-carbon steel strip which is deoiled, controlling the thickness of the chrome layer in 0.01-1um, positioning the low-carbon steel strip which is plated with chrome in the liquid groove, electroplating nickel layer on the low-carbon steel strip which is plated with chrome, controlling the thickness of the nickel layer in 10-20um, positioning the low-carbon steel strip which is electroplated with nickel layer in the liquid groove, carrying out inactivating treatment, preserving heat of electroplating chrome / nickel layer steel strip which is inactivated, removing hydrogen in the plating layer, carrying out diffusion annealing treatment on the electroplating chrome / nickel layer steel strip which is dehydrogenated, and obtaining corrosion-resisting nickelplate / chrome steel strip.

Description

technical field [0001] The invention relates to a steel strip, in particular to a high-performance corrosion-resistant nickel / chromium-plated steel which is tightly combined with electroplated nickel / chromium thick coating and low-carbon steel strip and can be used in chemical industry, machinery, communication equipment and other industries Belt preparation method. Background technique [0002] Nickel-coated steel strip is widely used in chemical industry, machinery, construction, communication equipment, electric tools and other fields. Its preparation process is generally to closely combine the electrodeposited nickel coating with the low-carbon steel substrate. For example, the steel case production process of the existing secondary battery and alkaline primary battery is to roll a layer of nickel plating after molding with a low carbon steel strip. Due to the difficulty in cleaning, insufficient plating depth and discharge at the tip of the plating during rolling nicke...

Claims

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Application Information

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IPC IPC(8): C23C28/02C25D3/04C25D3/12C25D5/36C23G1/19C25F1/06C25D5/14C23C22/62C21D9/52
Inventor 刘兴军李伟生王翠萍马云庆
Owner XIAMEN UNIV
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