Thin layer liquid membrane measuring and controlling method of metal thin liquid membrane corrosion and electrolytic bath device thereof

Abstract

The invention discloses a thin layer liquid membrane measuring and controlling method of metal thin liquid membrane corrosion and an electrolytic bath device thereof. The thin layer liquid membrane measuring and controlling method of the metal thin liquid membrane corrosion comprises a method for measuring and controlling the thickness of an open liquid membrane and the thickness of a closed liquid membrane together and a method for separately measuring and controlling the thickness of the open liquid membrane. The electrolytic bath device adopted by the thin layer liquid membrane measuring and controlling method of metal thin liquid membrane corrosion comprises a screw micrometer, an external thread insulating rod, a platinum probe, an internal thread insulating tube, an electrode platform, an annular electrode, a circular electrode, an auxiliary electrode, an electrode loading platform, a container, a reference electrode and a zero-resistance ampere meter. The method is suitable for researching the corrosion electrochemical behavior of substrate metal in an environment that the open liquid membrane is related to the closed liquid membrane; simultaneously, the thickness of the open liquid membrane can be measured and controlled separately, so that the method is also suitable for researching the corrosion electrochemical behavior of substrate metal in an environment of the single thin layer liquid membrane.

Description

technical field [0001] The invention relates to a thin-layer liquid film measurement and control method and device thereof for metal thin liquid film corrosion, in particular to a combined measurement and control method for an open liquid film and a closed liquid film and an electrolytic cell device. Background technique [0002] Thin liquid film corrosion is the most common form of corrosion failure suffered by metallic materials, especially for metallic materials serving in atmospheric environments. For metal materials used in the atmospheric environment, there are different forms of thin liquid film corrosion environments, one is an open form of thin liquid film, which is characterized in that the thin liquid film formed on the metal surface directly communicates with the atmosphere, A thin liquid film exposed to the atmosphere, that is, an open thin liquid film, such as a liquid film formed on a bare metal or a metal component; the other is an occluded thin liquid film, ...

AI Technical Summary

Problems solved by technology

For example, we often find metal / coating systems applied in atmospheric environments where delamination of the coating extends along localized areas of bare metal, suggesting that atmospheric corrosion of bare metal under an open thin liquid film affects adjacent areas of the underlying substrate The corrosion process of the metal, which affects the corrosion process of the metal under the occlusive liquid film, thus affecting the peeling failure process of the coating

However, there is still no electrolytic cell setup suitable for studying the electrochemical corrosion behavior of metals in such open and closed liquid film associated environments.

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