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Tin-plated board corrosion-resistance rapid detecting method

A detection method and technology of tinplate, applied in the direction of weather resistance/light resistance/corrosion resistance, measuring device, instrument, etc., can solve the problems of numerous detection procedures, high detection operation requirements, limitation of tinplate reference function, etc.

Inactive Publication Date: 2005-10-05
BAOSHAN IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inspection equipment is complicated, the inspection procedures are numerous, and the inspection time is long. It takes 24 hours for a inspection from the preparation of the test to the completion of the inspection. The inspection operation requires high requirements and is difficult. The vibration and other influences on the test results. In addition, the test uses a 12.7×114.3 mm tin plate, and the detection area is only a small area of ​​230 square millimeters, which also has certain restrictions on the reference role of the entire tin plate.

Method used

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  • Tin-plated board corrosion-resistance rapid detecting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The YQ-Z-48A whiteness and color measuring instrument produced by Hangzhou Qingtong Instrument Development Co., Ltd. was used to sample the whiteness of the corrosion-resistant alloy layer of the tinplate.

[0020] The specific operation steps are as follows:

[0021] (1) Sampling of tin plate

[0022] Take tinplate production samples on site, and punch three disc samples with a diameter of 25.4 mm in the width direction on the punching machine.

[0023] (2) Detinning treatment

[0024] Clean the tinplate sample with electrochemical method, the cathode is 30 seconds, the anode is 5 seconds, then the cathode is 30 seconds, the anode is 5 seconds, and the cathode is 30 seconds; after cleaning, put 20~50g / L NaOH and 5~10g / L L's KIO 3 The tin layer is removed in the solution formed, and the tin removal time is 10 to 20 minutes. In this embodiment, the NaOH of 50g / L and the KIO of 10g / L are put in after cleaning. 3 The tin layer is removed in the formed solution, and the...

Embodiment 2

[0031] For the ATC corrosion resistance test and whiteness test of the tinplate in the past three months, the distribution map of the whiteness value and ATC value can be found in figure 1 .

[0032] according to figure 1 The distribution diagram shows that: when the whiteness value of the alloy layer is lower than 12, the ATC values ​​are basically all higher than 0.12μA / cm2, and when the whiteness value of the alloy layer is higher than 16, the ATC values ​​are basically all lower than 0.12μA / cm2, and when the whiteness value of the alloy layer reaches 18, the ATC value of the alloy layer is between 0.02 and 0.04μA / cm2.

[0033] When the whiteness detection value of the alloy layer of the tinplate is ≥16, it is judged that the corrosion resistance of the tinplate is good, and the corresponding ATC range is 0.02-0.12. In order to determine the ATC level of the tinplate, a sample size of 1:10 is used for ATC testing and random inspection ;When the whiteness value is 14-15, ...

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Abstract

The invention relates to a tin coating surface survey technique especially to the eroding resistance fast test. Its main steps include: 1. sampling on the sheet; 2. uncoat tin from the sample; 3. white degree test, put the sample in to white degree apparatus and record the test value; 4. compare and judge the test value with eroding resistance degree. The quality is good if white degree is 16 or higher, normal if between 14 to 15 and bad if less than 13. the invention test in physical method and the device and sample process is simple, easy and stable, fast, can be used in daily survey and non-routine survey.

Description

(1) Technical field [0001] The invention relates to a detection technology for the surface of a tinplate, in particular to a rapid detection method for the corrosion resistance of a tinplate. (2) Background technology [0002] Tinplate is mainly used in the field of food cans, and the corrosion situation is complicated. The corrosion resistance of tinplate is generally tested by electrochemical methods. For example, US Patent No. 3,684,679 introduces an electrochemical device for detecting the corrosion resistance of tinplate. European patent EP 1106986 introduces the detection method patent of tinplate sampling, degreasing, tin removal and detection of medium concentration, electrode current, time, etc. when the electrochemical method of tinplate is used to detect corrosion resistance. The most authoritative test for the corrosion resistance of tinplate is the electrochemical alloy-tin galvanic test method, referred to as the ATC test, which has been included in the ASTM s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00
Inventor 贡雪南李宁钱钢黄邦霖
Owner BAOSHAN IRON & STEEL CO LTD
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