1 results about "Multiple stress" patented technology

The present application aims to reveal the influence mechanism of stress level and stress gradient on the behavior of metal material hot salt corrosion, and provides a force-chemical coupling test method and device of metal material considering stress gradient, aiming at the technical defects that mechanical load and corrosion environment are difficult to be controlled simultaneously in the existing research. First, a variable cross-section tensile deposited salt sample is designed, which can form different stress level and stress gradient distribution areas under a single loading condition. Second, the hot salt corrosion test under external stress is carried out under the condition of controlled temperature by artificially depositing the molten salt formed in the simulation of marine environment on the surface of the sample and applying external tensile load. Finally, the corrosion morphology, oxide film structure and element distribution of the sample are systematically characterized and quantitatively analyzed. The test method of the present application is simple, highly repeatable, can realize the comparative analysis of corrosion behavior under multiple stress states, and significantly improves the efficiency and accuracy of stress-corrosion synergistic effect research.