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Electroplating solution composition and technology for electroplating high-iron and low-tin alloy

A technology of tin alloy and electroplating solution, which is applied in the field of iron-tin alloy electroplating process and the composition of electroplating solution for electroplating high-iron-low-tin alloy, which can solve the problems of poor wear resistance, limited use, harmful to human body, etc., and achieve smooth and smooth surface, good The effect of surface binding

Active Publication Date: 2019-03-08
YUNNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most metal elements such as copper, nickel, and chromium are harmful or toxic to the human body, and the use of coatings composed of such elements on people's daily devices will be increasingly restricted
Iron and tin elements are friendly and non-toxic to the human body, and are silver-white metals with silver-white luster and decoration, but the iron surface is easy to oxidize and rust, and its protective performance is poor
Although the tin surface can produce a dense oxide film with good protective performance, but the hardness is small and the wear resistance is poor

Method used

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  • Electroplating solution composition and technology for electroplating high-iron and low-tin alloy
  • Electroplating solution composition and technology for electroplating high-iron and low-tin alloy
  • Electroplating solution composition and technology for electroplating high-iron and low-tin alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Pre-plating treatment

[0023] After grinding and polishing the plated copper piece, place it in acetone and ultrasonically wash it for 10 minutes, then put it in the temperature 30°C, the concentration is 4g L -1 Soak in hydrochloric acid solution for 10 minutes.

[0024] 2) Bath composition and electroplating

[0025] Bath composition: FeCl 2 4H 2 O 60g·L -1 , SnCl 2 2H 2 O 0.8g·L -1 , NaCl 3.2g·L -1 , H 3 BO 3 2.8g·L -1 , MnCl 2 2.8g·L -1 , ascorbic acid 0.8g L -1 , reduced iron powder 0.2g·L -1 , sodium lauryl sulfate 0.2g L -1 , tartaric acid 0.7g·L -1 , and adjust the pH to 1.8 with dilute HCl.

[0026] Electroplating: Connect the pre-plating copper sheet to the negative electrode (cathode) of the DC power supply, and place it in the above electroplating solution. The anode (connected to the positive electrode of the power supply) is an iron sheet. At a temperature of 50°C, the current density is 2A·dm -2 , the electroplating time is 10min, a...

Embodiment 2

[0031] 1) Pre-plating treatment

[0032] After grinding and polishing the plated copper piece, place it in acetone and ultrasonically wash it for 10 minutes, then put it in the temperature 35°C, the concentration is 5g L -1 Soak in hydrochloric acid solution for 15 minutes.

[0033] 2) Bath composition and electroplating

[0034] Bath composition: FeCl 2 4H 2 O 65g·L -1 , SnCl 2 2H 2 O 0.9g L -1 , NaCl 4.1g L -1 , H 3 BO 3 3.4g·L -1 , MnCl 2 3.9g·L -1 , ascorbic acid 1.4g·L -1 , reduced iron powder 0.4g·L -1 , sodium lauryl sulfate 0.6g L -1 , tartaric acid 0.8g·L -1 , mixed to a volume of 250 ml, and adjusted to pH 2 with dilute HCl.

[0035] Electroplating: Connect the pre-plating copper sheet to the negative electrode (cathode) of the DC power supply, and place it in the above electroplating solution. The anode (connected to the positive electrode of the power supply) is an iron sheet. At a temperature of 55°C, the current density is 2.5A·dm -2 , the elec...

Embodiment 3

[0040] 1) Pre-plating treatment

[0041] After grinding and polishing the plated copper piece, put it in acetone and ultrasonically wash it for 10 minutes, then put it in the temperature of 40°C, the concentration is 6g L -1 Soak in hydrochloric acid solution for 20 minutes.

[0042] 2) Bath composition and electroplating

[0043] Bath composition: FeCl 2 4H 2 O 70g·L -1 , SnCl 2 2H 2 O 1g L -1 , NaCl 5g·L -1 , H 3 BO 3 4g·L -1 , MnCl 2 5g·L -1 , ascorbic acid 2g·L -1 , reduced iron powder 0.5g·L -1 , Sodium Lauryl Sulfate 1.0g·L -1 , tartaric acid 0.9g·L -1 , mixed to a volume of 250 ml, and adjusted to pH 2.2 with dilute HCl.

[0044] Electroplating: connect the pre-plating copper sheet to the negative electrode (cathode) of the DC power supply, and place it in the above electroplating solution. The anode (connected to the positive electrode of the power supply) is an iron sheet. At a temperature of 60°C, the current density is 3A·dm -2 , the electroplati...

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Abstract

The invention relates to an electroplating solution composition and technology for electroplating a high-iron and low-tin alloy containing 75 wt%-85 wt% of iron in a chloride system, and belongs to the field of material surface electroplating. According to the technology method, treatment before electroplating is conducted, an electroplated part made of copper or brass is ground and polished and then placed in an organic solvent such as acetone liquid to be subjected to oil dirt removal, tap water is used for cleaning, then, the electroplated part is placed in a hydrochloric acid solution withthe temperature being 30-40 DEG C and the concentration being 4-6 g.L<-1> to be immersed for 10-20 min, and accordingly surface oxide is removed. For non-copper electroplated parts made of iron, an alloy of the iron and the like, polishing copper electroplating is conducted on the surfaces of the non-copper electroplated parts through a traditional method; an electroplating solution is prepared for electroplating according to the chart 1, and electroplating is conducted according to technology parameters; treatment is conducted after electroplating, an electroplated part obtained after electroplating is placed in a 5 wt%-10 wt% of NaOH solution to be immersed for 20-30 min, cleaning is conducted through tap water and distilled water or deionized water, an air blowing machine is used for blowing dry, and the high-iron and low-tin alloy containing 75 wt%-85 wt% of iron is obtained.

Description

technical field [0001] The invention belongs to an iron-tin alloy electroplating process, in particular to an electroplating solution composition and process for electroplating a high-iron-low-tin alloy (containing 75-85wt% iron) from a chloride system, and belongs to the field of material surface electroplating. Background technique [0002] Most of the surface decorative electroplating layers are copper, nickel, chromium, zinc and other metals and their alloy coatings or composite coatings. Such coatings are widely used due to their good protective and decorative properties. However, most metal elements such as copper, nickel, and chromium are harmful or toxic to the human body, and the use of coatings composed of such elements on people's daily devices will be increasingly restricted. Iron and tin elements are friendly and non-toxic to the human body, and are silver-white metals with silver-white luster and decoration, but the iron surface is easy to oxidize and rust, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56C25D5/34C25D5/48
CPCC25D3/562C25D5/34C25D5/48
Inventor 王薇君苏永庆曾聪钱逊
Owner YUNNAN NORMAL UNIV
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