Rhodium liquid manufacturing method

A production method and technology of rhodium powder, applied in the field of electroplating, can solve the problems of human allergy, welding scar color, blackening of silver alloy vulcanization, etc., and achieve the effects of cost reduction, simple formula and stable brightness.

Inactive Publication Date: 2018-03-09
赵占平
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Problems solved by technology

The ratio of gold alloy to pure gold has high hardness and low price. It is widely used in high-end handicrafts and jewelry. However, white gold alloy has the problem that the nickel release rate is too high to cause human allergies, and reducing the nickel content in the alloy will cause the co...

Method used

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Embodiment Construction

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, not to limit the present invention.

[0025] A kind of preparation method of rhodium liquid of the present invention, it comprises the following steps:

[0026] (1) 1 gram of rhodium powder and 45 grams of potassium hydrogensulfate analytically pure are put into a ceramic cauldron and fully mixed and stirred uniformly, evenly covering 5 grams of potassium hydrogensulfate analytically pure on its surface;

[0027] (2) Put the pot into the muffle furnace and heat it to 600 degrees for 4 hours;

[0028] (3) Take the cauldron out of the muffle furnace and let it cool in a natural state, and transfer the mixture into a beaker after cooling;

[0029] (4) Put a ceramic stirring rod in...

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Abstract

The invention provides a rhodium liquid manufacturing method. The method includes: adding rhodium powder and analytically-pure potassium hydrogen sulfate into a crucible, well mixing, uniformly covering with analytically-pure potassium hydrogen sulfate, putting the crucible in a muffle furnace, cooling, transferring mixed liquid into a beaker to dissolve by heating, filtering in a hermetic filterconical beaker through qualitative filter paper for a circulating multi-purpose vacuum pump, adding analytically-pure sodium hydroxide, standing to realize complete precipitation, and after water is clear and colorless, removing clear water in the beaker while keeping yellow solution; continuously and repeatedly filtering the kept solution by fine qualitative filter paper, transferring into another beaker, adding an appropriate amount of analytically-pure sulfuric acid, well stirring, adding an appropriate amount of ionized water, and heating while stirring until the solution is transparentlybrown. In normal use of rhodium liquid prepared according to the method, coating brightness is in a range of +/-0.5 stably, and formulation simplicity, easiness in operation, high utilization rate andcost reduction are realized.

Description

technical field [0001] The invention relates to the field of electroplating, in particular to a preparation method of rhodium solution. Background technique [0002] With the rapid development of my country's economy and the continuous improvement of people's living standards, my country's jewelry industry has achieved rapid development. Wherein the silver jewelry has been widely liked by people, but there is a phenomenon of blackening of the silver jewelry in case of sulfur so as to affect various aspects of performance. Therefore, the research and development of rhodium-plated materials for jewelry is of great significance for ensuring the safety of the people and promoting the status of my country's jewelry industry in international competition. [0003] In the jewelry industry, white gold alloy and silver alloy are currently the most used precious metal materials for jewelry. The ratio of gold alloy to pure gold has high hardness and low price. It is widely used in hig...

Claims

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Application Information

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IPC IPC(8): C25D3/50
CPCC25D3/50
Inventor 赵占平
Owner 赵占平
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