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A kind of method for accurately measuring the content of hydrochloric acid in ferric chloride corrosion solution

A technology of corrosive solution and ferric chloride, applied in the field of chemical analysis, to achieve the effect of real and reasonable calculation results, clear titration end point and narrow indication range

Active Publication Date: 2018-04-10
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Query hydrochloric acid solution, the relevant one is "Method for Selectively Separating Iron from Hydrochloric Acid Solution Containing Ferric Chloride" patent number: CN201210153853. Related patent content involves the detection of nickel ions in ferric chloride, and the Determination method of iron in hydrochloric acid solution, but does not involve the method of hydrochloric acid content in ferric chloride corrosion solution

Method used

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  • A kind of method for accurately measuring the content of hydrochloric acid in ferric chloride corrosion solution
  • A kind of method for accurately measuring the content of hydrochloric acid in ferric chloride corrosion solution

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Embodiment 1

[0037] This embodiment is a method for measuring the content of hydrochloric acid in a superalloy corrosion solution. The technical conditions of the solution are HCl91g / L-126g / L, FeCl3242g / L-300g / L, including the following steps:

[0038] Step 101, use a pipette to accurately draw 10.00 ml of superalloy corrosion solution, place it in a 100 ml volumetric flask, dilute to the mark with distilled water, and shake well. A dilution of the superalloy corrosion solution is obtained.

[0039] Step 102, use a pipette to accurately draw 10.00 ml of the above dilution solution, and place it in a 250 ml Erlenmeyer flask. A dilution of the separated superalloy corrosion solution is obtained.

[0040] Step 103: Add 5.00 ml of ascorbic acid solution and 50 ml of distilled water to the diluent of the superalloy corrosion solution divided into 250 ml of the Erlenmeyer flask. A diluent of the superalloy corrosion solution in which iron ions are reduced to +2 valence is obtained.

[0041] S...

Embodiment 2

[0052] This embodiment is a method for measuring the content of hydrochloric acid in the metallographic corrosion solution of stainless steel. The technical conditions of the solution are HCl66g / L-76g / L, FeCl33g / L-7g / L, including the following steps:

[0053] Step 201, use a pipette to accurately absorb 10.00 ml of stainless steel metallographic crystal decay solution, place it in a 100 ml volumetric flask, dilute to the mark with distilled water, and shake well. A dilution solution of the stainless steel metallographic crystal corrosion solution is obtained.

[0054] Step 202, use a pipette to accurately draw 10.00 ml of the above dilution solution, and place it in a 250 ml Erlenmeyer flask. A dilution solution of the separated stainless steel metallographic crystal corrosion solution is obtained.

[0055] Step 203: Add 5.00 ml of ascorbic acid solution and 50 ml of distilled water to the diluted solution of the stainless steel metallographic crystal decay solution divided i...

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Abstract

The invention belongs to the technical field of chemical analysis, and provides a method for accurately measuring the content of hydrochloric acid in a ferric chloride corrosion solution, comprising: (1) diluting the ferric chloride corrosion solution with distilled water to obtain a dilution of the ferric chloride corrosion solution; (2) ) draw the diluent to obtain the diluent of the ferric chloride corrosion solution that is taken out; (3) add ascorbic acid solution and distilled water successively to the diluent that is taken out to obtain iron ions that are reduced to +2 valent ferric chloride The diluent of corrosion solution; (4) in the diluent of ferric chloride corrosion solution that iron ion is reduced to +2 valence, add 10 drops of bromopotassium phenol green-methyl red indicator with dropper, with sodium hydroxide Standard solution is titrated to solution just to green, obtains the dilution of the complete ferric chloride corrosion solution of titration; (5) replace the dilution of ferric chloride corrosion solution with distilled water in addition, repeat step (2) to step (4), do Be a blank experiment; (6) Obtain the content of hydrochloric acid in the solution.

Description

technical field [0001] The invention belongs to the technical field of chemical analysis, and relates to a technology for accurately measuring the content of hydrochloric acid in a mixed solution of ferric chloride and hydrochloric acid, in particular to a technology for measuring the content of hydrochloric acid in a ferric chloride corrosion solution with relatively high iron content. Background technique [0002] Ferric chloride solution is used for etching of circuit boards and stainless steel, as well as surface treatment processes between processes, before metallographic and fluorescent detection. The main components of the solution are ferric chloride and hydrochloric acid, and it is widely used. [0003] At present, there is no specific method for the determination of hydrochloric acid content in ferric chloride corrosion solution in the national standard and navigation standard. The method that can be found is mainly free acid in industrial ferric chloride, which in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/79
Inventor 刘朝马静岳航赵勇郭子静
Owner AECC AVIATION POWER CO LTD
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