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, ...

Examples

Embodiment 1

[0016] Embodiment 1, the method of joint measurement and control of open liquid film thickness and occluded liquid film thickness:

[0017] Round and ring electrodes machined from pure zinc. First, polish the electrode with 600 water-based sandpaper, and adjust the circular and ring electrodes to be at the same level as the electrode table, then rinse the electrodes with distilled water and absolute ethanol, and then dry them with cold air. according to figure 1 After assembling the electrolytic cell device, first connect a zero-resistance ammeter between the circular electrode and the platinum wire at the side end of the externally threaded insulating rod to determine whether there is current passing between the circular electrode and the platinum probe, and slowly rotate the screw micrometer Move the platinum probe to the surface of the circular electrode until the zero-resistance galvanometer shows that there is current passing through, count the reading of the spiral micr...

Embodiment 2

[0019] Embodiment 2, the method for separately measuring and controlling the thickness of the open liquid film:

[0020] Round and ring electrodes machined from pure zinc. First, polish the electrode with 600 water-based sandpaper, and adjust the circular and ring electrodes to be at the same level as the electrode table, then rinse the electrodes with distilled water and absolute ethanol, and then dry them with cold air. according to figure 1 After assembling the electrolytic cell device, connect a zero-resistance ammeter between the circular electrode and the platinum wire at the side end of the externally threaded insulating rod to judge whether there is current passing between the circular electrode and the platinum probe, and slowly rotate the screw micrometer to make The platinum probe moves toward the surface of the circular electrode until the zero-resistance galvanometer shows that there is current passing through, counts the reading of the spiral micrometer, then mo...

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, ...

Examples

Embodiment 1

[0016] Embodiment 1, the method of joint measurement and control of open liquid film thickness and occluded liquid film thickness:

[0017] Round and ring electrodes machined from pure zinc. First, polish the electrode with 600 water-based sandpaper, and adjust the circular and ring electrodes to be at the same level as the electrode table, then rinse the electrodes with distilled water and absolute ethanol, and then dry them with cold air. according to figure 1 After assembling the electrolytic cell device, first connect a zero-resistance ammeter between the circular electrode and the platinum wire at the side end of the externally threaded insulating rod to determine whether there is current passing between the circular electrode and the platinum probe, and slowly rotate the screw micrometer Move the platinum probe to the surface of the circular electrode until the zero-resistance galvanometer shows that there is current passing through, count the reading of the spiral micr...

Embodiment 2

[0019] Embodiment 2, the method for separately measuring and controlling the thickness of the open liquid film:

[0020] Round and ring electrodes machined from pure zinc. First, polish the electrode with 600 water-based sandpaper, and adjust the circular and ring electrodes to be at the same level as the electrode table, then rinse the electrodes with distilled water and absolute ethanol, and then dry them with cold air. according to figure 1 After assembling the electrolytic cell device, connect a zero-resistance ammeter between the circular electrode and the platinum wire at the side end of the externally threaded insulating rod to judge whether there is current passing between the circular electrode and the platinum probe, and slowly rotate the screw micrometer to make The platinum probe moves toward the surface of the circular electrode until the zero-resistance galvanometer shows that there is current passing through, counts the reading of the spiral micrometer, then mo...

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