Three-point bending test device for simulating corrosion fatigue of splash zone of ocean

Abstract

The invention relates to a three-point bending test device for simulating the corrosion fatigue of a splash zone of an ocean. The three-point bending test device comprises a three-point bending test block, a main box for fixing the three-point bending test block, an auxiliary box for keeping the test water level, a seawater spraying pipeline for simulating wave splashing, and a seawater circulating power device for providing power for seawater flowing. The three-point bending test device can not only guarantee that cracks are in impurity-free circulating seawater but also prevent seepage, is easy to operate, and integrates the functions of environmental protection, automation and intelligentization.

Description

technical field [0001] The invention belongs to the technical research field of metal material corrosion, and relates to a three-point bending test device for corrosion fatigue test in an ocean wave splash zone. Background technique [0002] Corrosion fatigue refers to the fracture phenomenon of metal materials caused by the synergistic effect of corrosive medium and alternating stress or pulsating stress. Corrosion fatigue of metal materials has become an important content in the field of corrosion science research. Engineering practice often causes major accidents and brings heavy losses to the national economy because components cannot withstand harsh corrosion and load conditions. From the perspective of safe, economical and rational use of metal materials, human beings urgently need to understand the knowledge of corrosion fatigue of metal materials, especially for the corrosion fatigue phenomenon and mechanism of some typical metal materials that have been widely used...

AI Technical Summary

Problems solved by technology

This test process is not applicable to the three-point bending sample because the extensometer cannot be installed; in "An Electrolytic Cell Device for Electrochemical In-situ Measurement", a corrosion device for the three-point bending sample is designed, but Since the sample needs to be fixed on the testing machine, it is only suitable for small-sized three-point bending tests, and the corrosive liquid is easy to overflow; in "A Fixture for Corrosion Fatigue Test", only the specific details of the three-point bending test fixture are given. form, the corrosion box is not described in detail, and the sample is not easy to fix, and the operation is complicated

Therefore, it is generally difficult to simulate the corrosion fatigue behavior in the spray splash zone in the existing technology, especially the device for three-point bending specimens

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