Method for analyzing component content of zinc-nickel alloy electroplating solution

A zinc-nickel alloy and solution technology, which is applied in the direction of analyzing the material by chemical reaction, material analysis by observing the influence on the chemical indicator, color/spectral characteristic measurement, etc., can solve the problem of many steps, high analysis cost, Problems that affect the accuracy of the analysis results, etc., to achieve the effect of ensuring stability and good corrosion resistance

Inactive Publication Date: 2014-12-24
SICHUAN JIUZHOU ELECTRIC GROUP
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Problems solved by technology

[0004] At present, the commonly used alkaline zinc-nickel alloy solution composition analysis method in China has many steps, which is time-consuming and labor-intensive,

Method used

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  • Method for analyzing component content of zinc-nickel alloy electroplating solution
  • Method for analyzing component content of zinc-nickel alloy electroplating solution
  • Method for analyzing component content of zinc-nickel alloy electroplating solution

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Experimental program
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Embodiment

[0041] (1) Determination of zinc oxide content

[0042] The reagents required for this analysis step are as follows:

[0043] 10g / ml potassium cyanide solution; ascorbic acid (solid); pH=10 ammonia buffer solution; chrome black T indicator; 50% formaldehyde aqueous solution; 0.05mol / l EDTA standard solution; triethanolamine; ammonium fluoride (solid). Among them, the EDTA standard solution is self-made, and the calibration concentration is 0.0497mol / L.

[0044] Preparation of zinc-nickel alloy electroplating solution:

[0045] Precisely prepare zinc-nickel alloy electroplating simulation solution according to the solution preparation method: accurately weigh 12.00g of zinc oxide, 8.00g of nickel sulfate, and 120.00g of sodium hydroxide, add water to make 1 liter of solution, then the content of zinc oxide in the solution is 12g / L , nickel sulfate is 8g / L, and sodium hydroxide is 120.00g / L.

[0046] Specific analysis steps:

[0047] ① Accurately draw 10.00ml of the zinc-nic...

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Abstract

The invention provides a method for analyzing the component content of a zinc-nickel alloy electroplating solution. The method comprises a step of measuring nickel ion content, wherein the step comprises the sub-steps of adding a tartaric acid solution, a sodium hydroxide solution, an ammonium persulfate solution and a mixed solution of dimethylglyoxime and sodium hydroxide in the zinc-nickel alloy electroplating solution and measuring the absorbance of the obtained mixture under the wavelength range of 460 to 475nm. The method can further comprises steps of measuring zinc oxide content and sodium hydroxide content. In the step of measuring the nickel ion content, the proper standing time of the mixed solution, of which the absorbance is measured, and a proper absorption wavelength for the measurement of the absorbance are selected, so that the measurement accuracy of nickel ions is improved. In the step of measuring the zinc oxide content, ammonium fluoride and triethanolamide are added, so that the operability and accuracy in measurement of zinc oxide are improved. In addition, the method comprises a few steps, and is high in accuracy, low in cost and suitable for industrial application.

Description

technical field [0001] This field relates to an analysis method of an electroplating solution, in particular to a method for analyzing the component content of a zinc-nickel alloy electroplating solution. Background technique [0002] Zinc-nickel alloy is a kind of corrosion-resistant coating with excellent corrosion resistance. The corrosion resistance of zinc-nickel alloy layer containing 13% nickel is 6-10 times higher than that of zinc coating, and it is better than cadmium and cadmium-titanium alloy coating. At the same time, the mechanical properties of the steel will not be changed after electroplating zinc-nickel alloy, and the brazing property is excellent, the internal stress of the coating is small, the adhesion is strong, and the coating is bright and smooth. Because the zinc-nickel alloy coating has so many advantages, it is especially suitable for use in harsh industrial atmospheres and harsh marine environments as a substitute for cadmium coatings, such as for...

Claims

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Application Information

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IPC IPC(8): G01N21/78G01N21/31
Inventor 王昭飞何锡勇
Owner SICHUAN JIUZHOU ELECTRIC GROUP
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