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Preparation method of colorful rhodanizing layer

A color and rhodium-plating liquid technology, applied in the field of metal plating, can solve the problems that limit the development of domestic jewelry, achieve the effects of rich colors, improved brightness, and improved roughness

Inactive Publication Date: 2019-01-08
胡果青
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among them, rhodium plating has long been limited to bright white rhodium plating with brighteners and bright rhodium plating with leveling agents. Few documents involve multi-color rhodium plating. Major jewelry companies mainly rely on imported plating solutions from abroad, which greatly limits the domestic jewelry market. develop

Method used

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  • Preparation method of colorful rhodanizing layer

Examples

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Effect test

example 1

[0030] Take a piece of brass and polish it to remove oil, then put it into 1L deionized water and ultrasonically clean it for 10 minutes, and then put it into 1L0.5mol / L sulfuric acid solution for activation to obtain an activated plate; the activated plate is first plated Nickel, obtain nickel-plated plate; Get 100g26g / L rhodium sulfate solution, 10000g25g / L sulfuric acid solution, 50g sodium hexametaphosphate, 20g copper sulfate, 10g magnesium sulfate and 10g potassium selenate mix to obtain rhodium plating solution; Rhodium plating solution etc. Divide into three parts, add 10g sodium lauryl sulfate and 100g5g / L benzylamine solution to the first rhodium plating solution, and obtain rhodium plating solution A after stirring, add 10g dodecyl sulfuric acid to the second rhodium plating solution Sodium and 200g5g / L benzylamine solution, after stirring, obtain rhodium-plated solution B, add 10g sodium lauryl sulfate and 400g5g / L benzylamine solution in the third part of rhodium-p...

example 2

[0032]Take a piece of brass and polish it to remove oil, then put it into 1L deionized water and ultrasonically clean it for 10 minutes, and then put it into 1L0.5mol / L sulfuric acid solution for activation to obtain an activated plate; the activated plate is first plated Nickel, obtain nickel-plated plate; Get 150g26g / L rhodium sulfate solution, 15000g25g / L sulfuric acid solution, 80g sodium hexametaphosphate, 30g copper sulfate, 15g magnesium sulfate and 15g potassium selenate mix to obtain rhodium plating solution; Rhodium plating solution etc. Divide into three parts, add 15g sodium lauryl sulfate and 150g5g / L benzylamine solution to the first part of rhodium plating solution, obtain rhodium plating solution A after stirring, add 15g dodecyl sulfuric acid to the second part of rhodium plating solution Sodium and 300g5g / L benzylamine solution, after stirring, obtain rhodium plating solution B, add 15g sodium lauryl sulfate and 600g5g / L benzylamine solution in the third part ...

example 3

[0034] Take a piece of brass and polish it to remove oil, then put it into 1L deionized water and ultrasonically clean it for 10 minutes, and then put it into 1L0.5mol / L sulfuric acid solution for activation to obtain an activated plate; the activated plate is first plated Nickel, obtain nickel-plated plate; Get 200g26g / L rhodium sulfate solution, 20000g25g / L sulfuric acid solution, 100g sodium hexametaphosphate, 40g copper sulfate, 20g magnesium sulfate and 20g potassium selenate mix to obtain rhodium plating solution; Rhodium plating solution etc. Divided into three parts, add 20g sodium lauryl sulfate and 200g5g / L benzylamine solution to the first rhodium plating solution, stir to obtain rhodium plating solution A, add 20g dodecyl sulfuric acid to the second rhodium plating solution Sodium and 400g5g / L benzylamine solution, after stirring, obtain rhodium-plated solution B, add 20g sodium lauryl sulfate and 800g5g / L benzylamine solution in the third part of rhodium-plated sol...

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Abstract

The invention relates to a preparation method of a colorful rhodanizing layer, and belongs to the technical field of metal coatings. A layer of nickel is plated on the surface of a brass sheet at first, rhodanizing is facilitated, then magnesium sulfate and potassium selenate are added in a rhodanizing solution, and the brightness of the rhodanizing layer can be improved remarkably; by sodium hexametaphosphate, the grain size of the rhodanizing layer can be small so that the rhodanizing layer is smooth, the formed rhodanizing layer is smooth and fine, meanwhile, in an electroplating process, transient reverse electroplating is carried out every time after forward electroplating lasts for a period of time, and therefore, if the surface of a coating has rough embossments, the embossments canbe repaired preferentially in the process of reverse electroplating; and meanwhile, because the concentration of rhodium ions in the rhodanizing solution is slowly reduced in a using process, three reverse rhodanizing times are decreased progressively, and the roughness of the surface of the rhodanizing layer is greatly improved. The prepared colorful rhodanizing layer has three basic colors of red, yellow and blue, the blue color also has dark and light color difference, the surface of the coating is smooth and glossy, and the coating has imporous bright patterns.

Description

technical field [0001] The invention relates to a method for preparing a colored rhodium-plated layer, which belongs to the technical field of metal plating. Background technique [0002] The preparation of multi-color coatings is currently mainly focused on bright white decorative coatings, such as tin and tin alloys, bright nickel and nickel alloys, electroplating precious metals and their alloys, etc., which are mainly used for high-end products such as handicrafts and jewelry; golden yellow coatings, Such as gold plating and gold alloy, imitation gold plating, copper alloy and imitation gold paint, mainly used in lighters, jewelry and decorations; Used in decorative crafts, hardware, home appliances, etc. [0003] Among them, rhodium plating has long been limited to bright white rhodium plating with brighteners and bright rhodium plating with leveling agents. Few documents involve multi-color rhodium plating. Major jewelry companies mainly rely on imported plating solut...

Claims

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Application Information

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IPC IPC(8): C25D3/50C25D5/02C25D5/12C25D5/18
CPCC25D3/50C25D5/02C25D5/12C25D5/18
Inventor 胡果青周立骆兵建
Owner 胡果青