What are the commonly used methods to test the corrosion resistance of coatings?

Methods for testing corrosion resistance are divided into two categories:: One type is the environmental test method, or the atmospheric exposure corrosion method. This type of method is to conduct atmospheric exposure corrosion resistance tests on the workpiece at a selected atmospheric exposure test site. The results are relatively real and have important reference value. Therefore, this method is generally used to test the corrosion resistance of important products and workpieces. This kind of atmospheric exposure test site is a place with typical regional climate characteristics, equipped with guardrails and signs, and has a monitoring system for climate indicators, including air pressure, temperature, humidity and meteorological conditions. There are dedicated personnel to manage and record data, but this method requires a long test time, some as long as one or two years or even longer. In order to improve R&D efficiency and obtain corrosion resistance information as soon as possible, the second type of method is now commonly used, namely the accelerated corrosion test method. The so-called accelerated corrosion test method uses equipment such as test chambers to simulate the working corrosion environment, and strengthens this environment to obtain corrosion status information more quickly. Including neutral salt spray test, acetate salt spray test, copper accelerated acetate salt spray test, corrosion paste test, etc. You can choose according to the working environment of the product.

In order to understand the protective performance of the coating on the surface of the part as soon as possible, accelerated corrosion test methods are usually adopted for the corrosion resistance of the coating, which is to conduct enhanced corrosion tests on the coating under certain test environments or conditions that are more typical than the usual natural corrosion environment, such as salt water spray tests, including neutral salt spray tests, acetic salt spray tests and copper salt accelerated salt spray tests. In addition to salt spray test, there are also salt water immersion method, artificial sweat test method, gas corrosion method, corrosion mud test method, etc. There are also other anti-corrosion methods under special conditions agreed upon by both parties, such as high-temperature anti-discoloration properties, etc. However, in the electroplating industry, the neutral salt spray test method is commonly recognized as a commonly used method to evaluate the corrosion resistance of coatings. The main reason is that this method was established as an international standard earlier and has been cited by many industries, thus becoming a common method for comparing and requiring the protective performance of coatings.

Methods for testing the corrosion resistance of coatings are divided into two categories:: One type is the environmental test method, or atmospheric exposure corrosion method, and the second type is the accelerated corrosion test method. One type of method is to conduct atmospheric exposure corrosion resistance tests on workpieces at a selected atmospheric exposure test site. The second type of method is accelerated corrosion test method. The so-called accelerated corrosion test method uses equipment such as test chambers to simulate the working corrosion environment, and strengthens this environment to obtain corrosion status information more quickly. Including neutral salt spray test, acetate salt spray test, copper accelerated acetate salt spray test, corrosion paste test, etc.

In order to understand the protective performance of the coating on the surface of the part as soon as possible, accelerated corrosion test methods are usually adopted for the corrosion resistance of the coating, which is to conduct enhanced corrosion tests on the coating under certain test environments or conditions that are more typical than the usual natural corrosion environment, such as salt water spray tests, including neutral salt spray tests, acetic salt spray tests and copper salt accelerated salt spray tests. In addition to salt spray test, there are also salt water immersion method, artificial sweat test method, gas corrosion method, corrosion mud test method, etc. There are also other anti-corrosion methods under special conditions agreed upon by both parties, such as high-temperature anti-discoloration properties, etc. However, in the electroplating industry, the neutral salt spray test method is commonly recognized as a commonly used method to evaluate the corrosion resistance of coatings. The main reason is that this method was established as an international standard earlier and has been cited by many industries, thus becoming a common method for comparing and requiring the protective performance of coatings.

According to relevant information recorded on the Internet: In order to understand the protective performance of the coating on the surface of the part as soon as possible, accelerated corrosion test methods are usually adopted for the corrosion resistance of the coating, which is to conduct enhanced corrosion tests on the coating under certain test environments or conditions that are more typical than the usual natural corrosion environment, such as salt water spray tests, including neutral salt spray tests, acetic salt spray tests and copper salt accelerated salt spray tests. In addition to salt spray test, there are also salt water immersion method, artificial sweat test method, gas corrosion method, corrosion mud test method, etc. There are also other anti-corrosion methods under special conditions agreed upon by both parties, such as high-temperature anti-discoloration properties, etc. However, in the electroplating industry, the neutral salt spray test method is commonly recognized as a commonly used method to evaluate the corrosion resistance of coatings. The main reason is that this method was established as an international standard earlier and has been cited by many industries, thus becoming a common method for comparing and requiring the protective performance of coatings.