Surface corrosion resistance quality control

Salt spray test

Salt spray test in aluminium alloy die casting process plays an important role in quality control and performance verification, helps to enhance the corrosion resistance of castings, prolong the service life, reduce the failure rate, so as to ensure the reliability and stability of the product in the complex environment.

1. Evaluate the effect of surface treatment: aluminium alloy die casting usually need to go through the surface treatment (such as plating, spraying, anodic oxidation, etc.) to enhance the corrosion resistance. Salt spray test can verify the effect of these surface treatment processes, to ensure that it can effectively protect the castings in the use of environmental corrosion, to extend product life.

2. Ensure product reliability and durability: aluminium alloys are prone to corrosion in humid or salty environments, especially in outdoor or marine environments. Through the salt spray test, it can judge the corrosion resistance of castings in harsh conditions, ensure that the service life and reliability of the products meet the requirements, and thus reduce maintenance costs.

3. Discovery of material and process defects: Salt spray test helps to expose material defects (such as inclusions and porosity) in castings and uneven and poor coverage in surface treatment processes. By detecting corrosion, potential defects can be detected in advance, and the process can be improved in time to enhance the quality of castings.

4. Meet customer and industry standards: many industries and customers have clear requirements for the corrosion resistance of aluminium alloy die castings, and the results of the salt spray test are an important basis for assessing whether the castings meet these standards. For example, automotive, aerospace and home appliance industries in the parts are usually required to carry out salt spray test to ensure that it can withstand the actual application of the environmental test.

5. Improve market competitiveness: aluminium alloy die castings with good corrosion resistance are more competitive in the market. Salt spray test as a means of evaluating corrosion resistance can help manufacturers to improve the quality of their products, gain the trust of their customers and increase the market acceptance of their products.

6. Data support for process improvement: Salt spray test data can be fed back into the production process to help optimise the formulation and surface treatment parameters, thus improving product consistency and corrosion resistance and establishing a long-term quality monitoring and improvement mechanism.