The Uniform Immersion Corrosion Test Method for Metal Materials in the Laboratory
The Uniform Immersion Corrosion Test Method for Metal Materials in the Laboratory is the most commonly used test method to investigate the corrosion resistance of metal materials. It is performed according to the provisions of GB 10124-88. The aim of this test is to determine the corrosion rate of the metal material to be tested and gain a reliable indicator of the corrosion resistance of the material under different exposure conditions.
The test procedure is divided into two parts. The first part of the test is the exposure of the sample to the corrosive environment. Usually the exposure media contain saline solutions of different concentrations, different acid or alkaline solutions, etc. The sample is suspended in or immersed in the test solution, and then exposed to controlled temperature, humidity and agitation for a certain period of time. During this period, the corrosion phenomena of the sample are observed and recorded.
The second part of the testing is the determination of the corrosion rate of the sample. In general, the products obtained from the immersion of the sample in the corrosive environment are weighed to determine the weight loss of the sample, which is then converted into a corrosion rate based on the exposure time and the weight loss.
In order to reduce the influence of factors such as meteorological environment and external factors on the testing conditions and the results, the experiment should be carried out in the laboratory. The laboratory will also ensure the use of standard and qualified corrosion test solutions, testing methods, measurement and analysis processes and instrumentation.
This test method is especially important for studying the corrosion resistance of metals under different exposure conditions, e.g., in seawater, high temperature and humidity environment and other corrosive environments. It is reliable and has a wide range of applicability, so it is especially popular in the field of industrial material detection.
The uniform immersion corrosion test method for metal materials in the laboratory is an important basis for the assessment of material corrosion performance and service life design. It is useful for providing reliable technological piece of evidence for material selection and metallurgical manufacturing, and helps to prevent long-term corrosion damage to the product and equipment. Therefore, it is necessary to pay attention to the principles and methods of this test in order to obtain reliable data, and ensure the correctness and objectivity of the test results.
