Quick evaluation test method of anti-corrosion performance of tin-plated board

Abstract

The invention relates to a quick evaluation test method of anti-corrosion performance of a tin-plated board. The quick evaluation test method is characterized by comprising the following steps: 1) selecting a tin-plated board being 1.1 g / m<2> in tin layer thickness and 4 mg / m<2> in passivated film thickness and pre-treating the tin-plated board; 2) placing the test sample in a salt fog corrosion test box, wherein the test sample is hanged on a hanging rod in the box body; 3) selecting a NaCl solution being 2% in mass concentration as a basic corrosion medium with a NaHSO3 solution in a certain concentration matched therewith, successively adjusting six dimensions of four test parameters comprising corrosion medium concentration, corrosion medium settlement quantity, temperature and test period to carry out a corrosion test; 4) when the corrosion test is finished, taking out the test sample and washing the sample through deionized water at 20-30 DEG C for 30-60 s, and air-drying the sample with cold air; and 5) comparing the test sample with six test result legends under the six dimensions, and evaluating and recording a result according to two characteristic parameters comprising corrosion area and corrosion point diameter to achieve quantitative evaluation of the anti-corrosion performance of the tin-plated board.

Description

technical field [0001] The invention relates to a rapid evaluation test method, in particular to a rapid evaluation test method for the corrosion resistance of a tinplate. Background technique [0002] Tinplate has many advantages such as firmness, beauty, and good formability, and is widely used in food cans, chemical cans, spray cans, carbonated beverage cans, packaging materials, etc. Tinplates will be corroded during production and transportation, especially in sea and humid climates, which will aggravate the corrosion of tinplates. Therefore, it is necessary to continuously improve the quality of tinplates to improve their corrosion resistance. Tinplate is a thin coating product, and the coating weight is 1.1 and 2.8g / m 2 Mainly, and with the decrease of tin resources, the thinning of tin plating has become the mainstream. For a long time, there is no good test method for quickly evaluating the corrosion resistance of tinplate, and the corrosion resistance of tinplate...

AI Technical Summary

Problems solved by technology

However, most of the above-mentioned test methods are mechanistic and microscopic studies, which require expensive testing equipment and a long test cycle to complete the relevant tests, which is not conducive to the rapid acquisition of tin-plated product corrosion resistance by technical personnel related to tin-plated products. index

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