Salt spray test of several test results determination methods

Salt spray test, as an important means of assessing the salt spray corrosion resistance of products or metal materials, the determination of the test results is not only directly related to the judgment of product quality, but also affects the subsequent research and development and production decisions. Salt spray test results determination of the four main methods: rating determination method, weighing determination method, corrosive material appearance determination method and corrosion data statistical analysis method.

1. Rating and judgment method

Rating judgment method, is the corrosion area and the total area of the sample ratio of the percentage in accordance with certain standards into a number of grades, to a particular grade as a qualified or unqualified basis for judgment. This method is particularly suitable for the evaluation of flat samples, because it can visually reflect the degree of corrosion of the sample surface.

2.Weighing judgment method

Weighing judgment method is through the measurement of corrosion test before and after the change in the quality of the sample, calculate the weight of the corrosion loss (or weight gain), in order to judge the corrosion resistance of the sample quality. This method is particularly suitable for accurate assessment of the corrosion resistance of metal materials.

3.The appearance of corrosive material judgment method

Corrosive appearance determination method is a qualitative determination method, which is based on the salt spray corrosion test whether the product produces visible corrosion phenomenon to judge the corrosion resistance of the sample. This method is simple and intuitive, easy to operate, so it is widely used in many product standards.

4. Corrosion data statistical analysis

Statistical analysis of corrosion data is a more complex and comprehensive determination method, which combines the test design, data collection, statistical analysis and other aspects of the design of corrosion tests, analysis of corrosion data, corrosion data to determine the confidence level of the scientific method.

5. Comprehensive application

In practical application, these four determination methods often do not exist in isolation, but according to specific needs and test conditions for flexible selection and combination. For example, in the evaluation of the corrosion resistance of flat plate samples, you can prioritize the use of rating determination method and weighing determination method; and in the assessment of complex shapes or surface treatment of uneven samples, can be combined with the emergence of corrosive material determination method and statistical analysis of corrosion data for a comprehensive judgment.