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Rapid analysis method for main salts in zinc-nickel electroplating solution

A rapid analysis, zinc-nickel electric technology, applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, etc., can solve the problems of unequipped laboratories, inconvenient operation, and complicated measurement processes and other issues, to achieve the effect of maintaining the ecological environment, improving the protection of workers' life safety, and reducing the error

Inactive Publication Date: 2015-10-07
SHENYANG LIGONG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

After reviewing the literature and visiting the factory, it is found that the determination of the main salt content in the electroplating solution, especially the determination of zinc, still uses an older process, and potassium cyanide, a highly toxic substance, is used
And the measurement process is relatively complicated. Due to various factors, the workers in the factory cannot timely grasp the content of the main salt in the plating solution, and some small factories are not equipped with laboratories, so the operation is quite inconvenient.

Method used

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  • Rapid analysis method for main salts in zinc-nickel electroplating solution
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  • Rapid analysis method for main salts in zinc-nickel electroplating solution

Examples

Experimental program
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Embodiment

[0042] 1. Configuration and calibration of EDTA standard solution (0.05mol / L)

[0043] a) Preparation

[0044] Accurately weigh 9.3060g of analytically pure disodium ethylenediaminetetraacetic acid (C10H14N2Na208·2H20), dissolve it in distilled water, transfer to a 500mL volumetric flask and set to volume for later use.

[0045] b) Calibration

[0046] Accurately weigh 1.0008g of zinc oxide and place it in a 100mL small beaker, add 10.00mL of 1+1 hydrochloric acid solution into the beaker, stir to dissolve it, and rinse the inner wall with distilled water. Quantitatively transfer the Zn2+ solution to a 250mL volumetric flask, dilute to the mark, shake well, and calculate the concentration of the zinc standard solution.

[0047]Use a 25mL pipette to draw 25mL of zinc standard solution into the Erlenmeyer flask, add 1 drop of methyl red reagent, neutralize the hydrochloric acid in the zinc standard solution with 1+2 ammonia water, and the solution will turn from red to blue. ...

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Abstract

The invention discloses a rapid analysis method for main salts in a zinc-nickel electroplating solution. According to the invention, an alkaline galvanized nickel alloy electroplating solution is analyzed, and the total content of zinc and nickel ions in the electroplating solution is calculated by selecting a determination method directed at the chemical properties of the electroplating solution to titrate main components in the electroplating solution and determining the volume of a titration reagent according to color changes, precipitation and the like of the electroplating solution; and then the content of nickel ions in the electroplating solution is determined through usage of spectrophotometry, and the contents of zinc and nickel ions are calculated, so changes are made to a conventional standard determination method using cyanide with severe toxicity. Compared with the standard determination method, a novel determination process is established, and thorough cyanide elimination is realized in the alkaline galvanized nickel alloy electroplating industry.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a rapid analysis method for main salt in zinc-nickel electroplating solution. Background technique [0002] Zinc-nickel alloy electroplating is a steel anode type protective coating that has emerged in the past 20 years. Zinc-nickel alloys usually refer to low-nickel-content alloys with a nickel content of less than 20%. This type of alloy coating not only has corrosion resistance 7 to 10 times higher than that of galvanized coatings, but also has good paintability, weldability and formability. , so it is widely used in automobiles, aerospace, light industry, household appliances and other steel protection; in addition, zinc-nickel alloys also have the advantage of low hydrogen embrittlement, can replace cadmium coatings in the aviation industry, and have great development prospects. In the zinc-nickel alloy electroplating process, the main components of the electroplating solut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/79
Inventor 孙玉凤赵平彭旭孟祥鹤游婷汪雪
Owner SHENYANG LIGONG UNIV
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