Direct observation method, weighing method, weight loss method, resistance method.
1. Direct observation method: Regularly observe the corrosion of the metal surface and record it. This method can directly understand the corrosion situation of metal, including corrosion degree, corrosion morphology, etc.
2. Weighing Method: During corrosion testing, the metal is weighed regularly. The corrosion rate of a metal can be calculated by comparing the initial weight of the metal with the difference in weight after a certain time. This method is suitable for larger metal samples.
3. Weight loss method: Calculate the corrosion rate by regularly measuring the weight of the metal. Different from the weighing method, the weight loss method suspends the metal sample in the solution and calculates the corrosion rate by measuring the change in weight of the metal in the solution.has solution. This method is suitable for small metal samples.
4. Resistance method: Evaluate the degree of corrosion by measuring the resistance value of the metal. Corrosion will cause changes in the strength value of the metal. By comparing the initial resistance value of the metal with the resistance value after a certain time, the corrosion rate of the metal can be calculated. This method allows metal corrosion to be monitored in real time.