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Rotating disk electrode method for quantitative testing of porosity of tinned steel plate

A technology of rotating disc electrodes and tin-plated steel plates, which is applied in measurement devices, material electrochemical variables, permeability/surface area analysis, etc. The effect of low cost and simple operation

Active Publication Date: 2013-04-24
BAOSHAN IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing spectrophotometric method takes about 1 hour to detect a sample, and there is a certain lag in the detection of the porosity of the tin-plated steel plate, which cannot guide the adjustment of the production process in time

Method used

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  • Rotating disk electrode method for quantitative testing of porosity of tinned steel plate
  • Rotating disk electrode method for quantitative testing of porosity of tinned steel plate
  • Rotating disk electrode method for quantitative testing of porosity of tinned steel plate

Examples

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Effect test

Embodiment 1

[0025] A kind of rotating disc electrode method of quantitatively testing the porosity of tin-plated steel plate, this method comprises the steps:

[0026] Step 1, drawing of the standard straight line: first take 18mL of dilute sulfuric acid with a concentration of 10% by mass, 1mL of hydrogen peroxide with a concentration of 30% by mass, and 20mL of distilled water; In the solution composed, mix uniformly to prepare corrosion solution. Divide the corrosive solution into 5 parts, add ferric sulfate to make 5 parts of the corrosive solution into standard solutions with iron ion concentrations of 20mg / L, 40mg / L, 60mg / L, 80mg / L and 100mg / L, and transfer the standard solutions to In the three-electrode system that the rotating disc electrode is installed, the electrochemical workstation is connected, and the three-electrode system and the electrochemical workstation are all prior art, and the rotating speed of the rotating disc electrode is set to α, and α is 2000r / min, By using...

Embodiment 2

[0046] A kind of rotating disc electrode method of quantitatively testing the porosity of tin-plated steel plate, this method comprises the steps:

[0047] Step 1, drawing of the standard straight line: first take 22mL of dilute sulfuric acid with a mass percent concentration of 12%, 2mL of hydrogen peroxide with a mass percent concentration of 33%, and 25mL of distilled water; In the solution composed, mix uniformly to prepare corrosion solution. Divide the corrosive solution into 5 parts, add ferric sulfate to make 5 parts of the corrosive solution into standard solutions with iron ion concentrations of 20mg / L, 40mg / L, 60mg / L, 80mg / L and 100mg / L, and transfer the standard solutions to In the three-electrode system that the rotating disc electrode is installed, the electrochemical workstation is connected, and the three-electrode system and the electrochemical workstation are all prior art, and the rotating speed of the rotating disc electrode is set to α, and α is 1200r / min,...

Embodiment 3

[0068] A kind of rotating disc electrode method of quantitatively testing the porosity of tin-plated steel plate, this method comprises the steps:

[0069] Step 1, drawing of the standard straight line: first take 26mL of dilute sulfuric acid with a concentration of 15% by mass, 3mL of hydrogen peroxide with a concentration of 36% by mass, and 30mL of distilled water; In the solution composed, mix uniformly to prepare corrosion solution. Divide the corrosive solution into 5 parts, add ferric sulfate to make 5 parts of the corrosive solution into standard solutions with iron ion concentrations of 20mg / L, 40mg / L, 60mg / L, 80mg / L and 100mg / L, and transfer the standard solutions to In the three-electrode system that the rotating disc electrode is installed, the electrochemical workstation is connected, and the three-electrode system and the electrochemical workstation are all prior art, and the rotating speed of the rotating disc electrode is set to α, and α is 500r / min, By using ...

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Abstract

The invention relates to a rotating disk electrode method for quantitative testing of porosity of a tinned steel plate, which comprises the following steps: (1) drawing of a standard straight line: preparing standard solution with different iron ion contents, transferring the standard solution to a three-electrode system with rotating disc electrodes with the rotating speed alpha being 500-2000r / min, linearly scanning the cathode potential of the standard solution, and carrying out linear fitting of the current density under the potential beta, wherein beta is ranged from minus 0.45 to minus 0.10V; (2) packaging of a test piece: fixing the test pipe at the opening of a wild-mouth bottle filled with corrosive solution, and making the wild-mouth bottle inverted; (3) linear scanning of the cathode potential: transferring the corrosive solution in (2) into the three-electrode system with the rotating disc electrodes, and determining the current density at the potential beta; and (4) data processing. The invention has the advantages that the operation is easy, the use cost is low, and changes in the porosity of the tinned steel plate can be tested promptly, rapidly and accurately.

Description

technical field [0001] The invention relates to a tinplate surface detection technology, in particular to an electrochemical method for testing the porosity of a tinplate. Background technique [0002] Electroplated tin plate refers to cold-rolled low-carbon thin steel plate or steel strip coated with pure tin on both sides. It combines the strength and formability of steel with the corrosion resistance, solderability and aesthetics of tin in one material. Due to the characteristics of non-toxic tin, good ductility, and good corrosion resistance, electroplated tin steel sheets have been widely used in the food industry, shipping equipment, electronic devices and other industries. [0003] The structure of the reflowed tin-plated steel sheet can be roughly divided into three layers: steel substrate, Fe-Sn alloy layer and tin layer. The most ideal tin layer is dense and non-porous, but in fact, the tin-plated layer always exists pinhole. There are two types of pinholes,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08G01N27/26
Inventor 李兵虎黎德育周俊郑振邹美平李宁徐清亮高玉强
Owner BAOSHAN IRON & STEEL CO LTD