Experimental testing device and method for simulating static crevice corrosion of artificial joint

Abstract

The invention provides an experimental testing device and method for simulating static crevice corrosion of an artificial joint. The experimental testing device comprises an organic glass container, acontainer upper cover, a crevice forming device, a three-electrode electrochemical testing system and electrochemical testing equipment. Simulation body fluid is contained in the organic glass container, the container upper cover is arranged on the organic glass container, the gap forming device is used for fixing a sample and adjusting the width of a gap, the sample is made of an artificial joint material, the gap forming device and the three-electrode electrochemical testing system are arranged in the organic glass container, and the three-electrode electrochemical testing system is connected with the electrochemical testing equipment. The experimental testing device for simulating the static crevice corrosion of the artificial joint can accurately simulate the service environment of the artificial joint, has independent operability, can construct various accurate static crevice shapes in the experimental environment, and simulates different real states of the artificial joint in static service.

Description

technical field [0001] The invention relates to the technical field of crevice corrosion testing of artificial joint materials, in particular to an experimental testing device and method for simulating static crevice corrosion of artificial joints. Background technique [0002] Since the 21st century, the number of joint diseases has increased with the aging phenomenon in our country. People's pursuit of health has also become more specific with the overall improvement of living standards. The demand for biomedical materials has also increased, but biological Corrosion-based failures will occur after medical materials are implanted into the human body. Taking the hip joint as an example, the total replacement hip joint is mainly composed of the acetabulum, the femoral head and the stem. The stem is mechanically combined with the femoral head and fixed on the human femur. During service, there is a tiny gap between the femoral head and the acetabulum, and the width of this g...

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Problems solved by technology

[0002] Since the 21st century, the number of joint diseases has increased with the aging phenomenon in our country. People's pursuit of health has also become more specific with the overall improvement of living standards. The demand for biomedical materials has also increased, but biological Corrosion-based failure problems will occur after medical materials are implanted in the human body

Comparative analysis of existing patented experimental methods: the crevice corrosion devices involved in Chinese patent CN109632618B, Chinese patent CN110044810A and Chinese patent CN110031391A include wedge-shaped or step-shaped crevice formers. During the experiment, crevices of various widths exist simultaneously , interact with each other, and cannot really explore the crevice corrosion behavior under different crevice widths alone. Therefore, it is necessary to construct a device that can accurately simulate the service environment of artificial joints and have independent operability, and design corresponding experimental methods

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