Electrolytic tank for detecting corrosion resistance of packing material

Abstract

The invention provides an electrolytic tank for detecting corrosion resistance of a packing material. The electrolytic tank is sealed and provided with an upper cover and a cylindrical side wall, and takes a to-be-detected metal packing material, serving as a working electrode, as a bottom; the electrolytic tank is internally provided with electrolyte; a sealing ring is respectively arranged between the bottom and the side wall, as well as between the side wall and the upper cover to seal the electrolytic tank; the distance from the lower end of a reference electrode to the bottom is at least 1mm; a counter electrode is ring-shaped, and is arranged in the electrolyte and parallel to the bottom; the reference electrode is positioned in the center of the ring; the distance from the ring-shaped counter electrode to the surface of the electrolyte is one second or two thirds depth of the electrolyte, and the distance from the ring-shaped counter electrode to the bottom is not greater than the distance from the reference electrode to the bottom; and the upper cover is also provided with an inert gas inlet pipe and an air outlet pipe. The electrolytic tank can be used for imitating the actual use conditions of the packing material and reducing system error during detection; and the detected packing material can be re-utilized.

Description

technical field [0001] The invention relates to an electrolytic cell, in particular to an electrolytic cell for testing the corrosion resistance of packaging materials. Background technique [0002] Coated or film-coated metal packaging materials have been widely used in the food and beverage industry as replacement packaging materials, such as packaging materials for various fruit juices, tea drinks, milk, tomato sauce, luncheon meat and other products. With the increasing attention to safety issues, in addition to the quality of food or beverage itself, the safety of metal packaging materials used to package food or beverages has also become one of the issues of concern, the most prominent of which is the detection of metal packaging materials on the packaged items. How is the corrosion resistance. [0003] Before using metal packaging materials to pack food or beverages, it is necessary to detect the corrosion resistance of the packaging materials. Currently, the commonl...

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Problems solved by technology

[0005] The invention provides an electrolytic cell for testing the corrosion resistance of packaging materials. By designing the structure of a specific sealed electrolytic cell and the position, shape and area of ​​each electrode in the electrolytic cell, it solves the problem of using electrochemical impedance in the existing electrolytic cell. The process of testing the corrosion resistance of metal packaging materials by spectroscopy cannot simulate the real use conditions of packaging materials, and requires complex pre-processing, which leads to large system errors, and the pre-processing is easy to cause damage to metal packaging materials, so that the metal packaging materials cannot be reused after testing.

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