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Tin-cobalt alloy electroplating solution and process for electroplating spectacle frames with it

A metal spectacle frame and tin-cobalt alloy technology, applied in jewelry, etc., can solve the problems of high coating stress, easy cracks, short service life, etc., and achieve low coating stress, improved stability, improved stability and conductivity. Effect

Active Publication Date: 2018-08-10
YINGCHANG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, due to the excellent corrosion resistance and appearance of the tin-cobalt alloy coating, it has been widely used in the surface coating of eyeglass frames. From the perspective of traditional electroplating, the tin-cobalt alloy plating solution has the following plating types: 1. Pyrophosphate plating solution containing alkali metal salt of pyrophosphate and other main components. When the plating solution is used for a long time, the plating solution is prone to deposits. In order to prevent the formation of deposits, it is necessary to add an appropriate amount of metal complexing agent to the plating solution and tin antioxidants, which makes the process more difficult; 2. The fluoride plating solution containing SnF2 and NaHF2 and other main components, the plating solution contains greater toxicity, and its environmental performance is poor; 3. Contains phosphates Phosphate-based plating solution with main components such as chemical compounds. After use, the plating layer has high stress and is prone to cracks, resulting in a short service life.
In addition, pyrophosphate baths and phosphoric acid ester baths contain phosphorus compounds, which are more troublesome in wastewater treatment. If the water is not completely treated and the water flows into rivers, it will cause environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1, a kind of tin-cobalt alloy electroplating solution, its prescription is made up of following components in terms of mass parts: 300 parts of potassium pyrophosphate; 30 parts of cobalt chloride; 10 parts of stannous chloride; 5 parts of sodium glycine 2 parts of sodium diethylenetriaminepentaacetate; 0.5 part of tin antioxidant; during preparation, the above-mentioned raw materials are mixed in a reactor, and the temperature of the reactor is controlled at 45°C; the pH value is adjusted to make it 9; After the pH value is adjusted, the plating solution is filtered. During the filtering step, it needs to be filtered multiple times to make the internal impurity content less; after the filtration, it is fully stirred, and the corresponding electroplating solution can be obtained after stirring evenly.

[0023] A kind of technique of electroplating spectacle frame with tin-cobalt alloy electroplating solution, its process step is as follows:

[0024] a. Hanger...

Embodiment 2

[0035] Embodiment 2, the processing step of embodiment 2 is roughly the same as embodiment 1, and its difference is that its formula is calculated by the following composition in parts by mass: 325 parts of potassium pyrophosphate; 37.5 parts of cobalt chloride; 12.5 parts of stannous chloride 7.5 parts of sodium cysteine; 3.5 parts of sodium triethylenetetraminehexaacetate; 0.75 parts of tin antioxidant; during preparation, the above raw materials were mixed in a reactor, and the temperature of the reactor was controlled at 35°C; Value, make its pH value 8; Filter and stir to obtain the corresponding electroplating solution; It can also achieve the same effect as in Example 1.

Embodiment 3

[0036] Embodiment 3, the processing step of embodiment 3 is roughly the same as embodiment 1, and its difference is that its formula is calculated by the following composition in parts by mass: 350 parts of potassium pyrophosphates; 45 parts of cobaltous chlorides; 15 parts of stannous chlorides 10 parts of sodium glutamate; 5 parts of sodium triethylenetetraminehexaacetate; 1 part of tin antioxidant; during preparation, the above-mentioned raw materials were mixed in a reactor, and the temperature of the reactor was controlled at 55°C; the pH value was adjusted , so that its pH value is 9.5; filter and stir evenly to obtain the corresponding electroplating solution; it can also achieve the same effect as in Example 1.

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PUM

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Abstract

The invention discloses tin cobalt alloy electroplating liquid. The tin cobalt alloy electroplating liquid is composed of, by mass, 300 parts to 350 parts of potassium pyrophosphate, 30 parts to 45 parts of cobalt chloride, 10 parts to 15 parts of stannous chloride, 5 parts to 10 parts of amino carboxylic acid compounds, 2 parts to 5 parts of ethylamines and 0.5 part to 1 part of a tin antioxidant. During preparing, the raw materials are mixed in a reaction still, and the temperature of the reaction still is controlled to range from 35 DEG C to 55 DEG C; the PH value is adjusted, and ranges from 8 to 9.5; and filtering is carried out, the raw materials are uniformly stirred, and the corresponding electroplating liquid is obtained. A technology for electroplating a metal spectacle frame through the tin cobalt alloy electroplating liquid comprises the steps that a hanging tool is arranged on a workpiece; ultrasonic wax removal is carried out; ultrasonic oil removal is carried out, and electrolytic oil removal is carried out; electrolytic activation is carried out; nickel preplating is carried out; copper preplating is carried out; acid copper and nickel are brightened; electroplating of the tin cobalt alloy electroplating liquid is carried out, and passivation is carried out; ultrasonic pure water cleaning is carried out; electrophoresis coating and curing are carried out; and the spectacle frame is packaged and put in a storehouse.

Description

technical field [0001] The invention belongs to the technical field of electroplating solutions, in particular to a tin-cobalt alloy electroplating solution and a process for electroplating spectacle frames with the same. Background technique [0002] At present, due to the excellent corrosion resistance and appearance of the tin-cobalt alloy coating, it has been widely used in the surface coating of eyeglass frames. From the perspective of traditional electroplating, the tin-cobalt alloy plating solution has the following plating types: 1. Pyrophosphate plating solution containing alkali metal salt of pyrophosphate and other main components. When the plating solution is used for a long time, the plating solution is prone to deposits. In order to prevent the formation of deposits, it is necessary to add an appropriate amount of metal complexing agent to the plating solution and tin antioxidants, which makes the process more difficult; 2. The fluoride plating solution contain...

Claims

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Application Information

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IPC IPC(8): C25D3/56C25D7/00C25D5/34C25D5/48
CPCC25D3/56C25D5/34C25D5/48C25D7/00
Inventor 黄友权
Owner YINGCHANG GRP CO LTD