A research and development method for weathering steel based on rapid collection of corrosion data

Abstract

The invention provides a weathering resistant steel research and development method based on rapid corrosion data acquisition, and belongs to the technical field of weathering resistant steel researchand development. The method comprises the following steps of firstly, laminating and fixing the weathering resistant steel to be evaluated, a copper test piece and an insulating piece according to the sequence of "copper test piece-insulating piece-weathering resistant steel test piece-insulating piece-copper test piece", and manufacturing an electrode; then connecting a weathering resistant steel test piece in the electrode to the negative electrode of a micro-current meter by using a low-resistivity lead; connecting the copper test piece in the electrode to the positive electrode of the micro-current meter after being connected in parallel by using the low-resistivity lead; placing the electrode outdoors for corrosion test; and extracting the data of the micro-current meter after a period of time, and obtaining a corrosion development rule curve of the weathering resistant steel to be evaluated in outdoor service. By comparing the corrosion development rule curves of different weathering resistant steel, the corrosion resistance of the weathering resistant steel can be rapidly evaluated. The weathering resistant steel research and development method based on rapid corrosion dataacquisition has short test time and true and reliable test result.

Description

technical field [0001] The invention relates to the technical field of research and development of weathering steel, in particular to a weathering steel evaluation method based on rapid collection of corrosion data. Background technique [0002] Weathering steel is a low-alloy steel with excellent corrosion resistance in the atmospheric environment. Weathering steel is made of ordinary carbon steel with a small amount of corrosion-resistant elements such as copper and nickel added. Its weather resistance is 2-8 times that of ordinary carbon steel. Weathering steel is mainly used for steel structures exposed to the atmosphere for a long time, such as railways, vehicles, bridges, towers, photovoltaics, and high-speed projects. my country has a vast territory and complex and diverse climate types. The development of weathering steels that can be applied to different environments is one of the hot spots in the research of weathering steels at this stage. [0003] Existing studi...

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Problems solved by technology

In order to evaluate the corrosion resistance of a certain weathering steel, there are two commonly used evaluation methods: one is the outdoor coupon corrosion test, the test results of this method are reliable, but the test time is at least 1 year, otherwise the error of the test results is large; the other is The first is the indoor accelerated corrosion test, such as the weekly immersion corrosion test, salt spray corrosion test, etc. This method has a short test time but has a large error in the test results, and sometimes even draws wrong conclusions

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