Portable metallic material tensile stress etching apparatus and method

The invention discloses a device and a method for portable metal material tensile stress corrosion. A tensile sample is fixed on a loading main device through a loading pull rod and loading nuts; tensile force is applied to the tensile test by loading nuts, and then the tensile sample is selectively corroded through a corroding test groove which is in a structure shaped like a Chinese character ri and comprises an upper clapboard, a middle clapboard, a lower clapboard, clamping screws and a corrosion solution barrel; the corrosion solution barrel is fixed between the upper clapboard and the middle clapboard; the upper clapboard is provided with a solution changing hole; the middle clapboard is provided with a corroding hole; the tensile sample clings to the corroding hole and adds force to seal the space between the middle clapboard and the tensile sample through the clamping screws; and the corroding test groove can be also used for electrochemical test. The device and the method for portable metal material tensile stress corrosion have the advantages of convenient use and loading, easy operation, portability, selective corrosion and favorable observation.