Electrolytic bath device and method for evaluation of metal and coating film corrosion resistance

Abstract

The invention belongs to the technical field of a device for testing corrosion resistant electrochemical parameters of a metal material and a surface coating film and a method for corrosion resistance fast evaluation, and especially relates to an electrolytic bath device and method for evaluation of metal and coating film corrosion resistance. The device comprises a tightening nut, a liquid injection pipe, a corrosion electrolytic bath, a fixing column and a contact gasket. The method comprises the following steps of arranging a processed metal material and a film-coated sample below the device, selecting a corrosion area, tightly pressing the surface of the sample by a test device, injecting a certain volume of a corrosion solution into a corrosion electrolytic bath by a solution injection pipe so that loading of a metered volume of the corrosion medium to the sample is realized, and then carrying out corrosion electrochemical parameter measurement and corrosion resistance evaluation. The device and method have the advantages of loading convenience, operation simpleness, recycle, selective corrosion, observation convenience and wide application range.

Description

technical field [0001] The invention belongs to the technical field of a corrosion-resistant electrochemical parameter testing device for metal materials and surface coatings and a rapid evaluation method for corrosion resistance, and in particular relates to an electrolytic cell device and method for evaluating the corrosion resistance of metals and coatings. Background technique [0002] The corrosion resistance of metal materials and their coatings is an important parameter to study the service life of the materials and their coatings in the environment. At present, the equipment used to test the corrosion resistance of metal materials and their coatings has the characteristics of large volume, high price, inconvenient movement, large amount of corrosive medium, and environmental pollution. The experimental requirements for the evaluation. A portable rapid measuring device for corrosion resistance of coated metals has been developed in China, but because it uses a three-...

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Problems solved by technology

At present, the equipment used to test the corrosion resistance of metal materials and their coatings has the characteristics of large volume, high price, inconvenient movement, large amount of corrosive medium, and environmental pollution. Experimental Requirements for Evaluation

A portable rapid measuring device for corrosion resistance of coated metals has been developed in China, but because it uses a three-electrode system, the operation is complicated, and it cannot meet the requirements of fast, convenient, selective corrosion, repeated use, easy disassembly, and corrosion resistance of metal materials and coatings. REQUEST FOR RAPID EVALUATION

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