Corrosion coupon clamp for atmospheric exposure environment test

Abstract

The invention provides an atmospheric exposure environment test corrosion coupon clamp and belongs to the technical field of natural environment test devices. The clamp structurally comprises a base,an upright post on the base, a connecting part and a top cover, wherein the base is insulated from the upright post, the upright post is cylindrical and is positioned in the center of an upper surfaceof the base, the top cover is insulated, the bottom of the top cover is hollow corresponding to the upright post, a screw rod is fixedly connected in the base, extends out of the center of a lower surface of the base, and is matched with a nut to be fixed on an exposure rack sample fixing batten, the base and the top cover are connected through an elastic contraction part or are in threaded connection through an outer extension end of the screw rod in the base in the other direction, and protrusions with uniform sizes are distributed on a contact surface of the base and the top cover in a staggered mode. The clamp is advantaged in that the clamp is simple in structure, convenient to operate and capable of stably clamping corrosion hanging pieces with different thicknesses, meanwhile, thedesign of the convex points effectively reduces the contact area of the clamp and the corrosion hanging piece and avoids crevice corrosion.

Description

technical field [0001] The invention relates to the technical field of natural environment test devices, in particular to a corrosion coupon fixture for atmospheric exposure environment test. Background technique [0002] The material atmospheric exposure test is a natural environment test. By exposing the corrosion coupons of different materials to the natural atmospheric environment, they are directly subjected to the comprehensive effect of natural environmental factors within a specified period of time, so as to evaluate their adaptability and performance to the climate environment. weather resistance. Because the test results of natural atmospheric exposure environment test are more in line with reality, it can provide guidance for the selection and maintenance of materials in related equipment and facilities, so it has been valued by domestic and foreign scientific and technological circles and industrial departments. [0003] To carry out the atmospheric exposure env...

AI Technical Summary

Problems solved by technology

The sample fixture is simple in structure and easy to operate. When fixing it, you only need to clamp the four corners of the sample in the clamping slots of the four sample clamps respectively, but the size of the clamping slots greatly limits the corrosion coupon. Thickness, poor adaptability, and the large contact area between the corrosion coupon and the fixture, it is easy to induce crevice corrosion, which affects the reliability of the atmospheric exposure environment test results

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