The Salt Spray test is a laboratory test that is conducted to test the corrosion resistance properties of several metals and coatings. This test is performed using a machine called a Salt Spray chamber. Let us dive into the details of this testing chamber. All the necessary information regarding the salt spray test chamber will be covered in this blog. So, let’s start.
What is the Salt Spray test and how many test methods are in SST?
The salt spray test is a laboratory test which is done to test the corrosion resistance properties of metals. In SST, a 5% solution of NaCl is made and salt fog is produced in the salt spray chamber. The sample to be tested is placed inside the test chamber and changes on the sample would be monitored. Test methods
- Three test methods are used for conducting a salt spray test.
- Acetic Acid Salt Spray test
- Material for testing: Chromium Plating, Cadmium Plating on Zinc and steel.
- 5% Neutral Salt Spray Test
- Material for testing: Platings and coatings on metallic parts.
- CASS( Copper Accelerated Salt Spray Test).
- Material for testing: Decorative Copper Nickel chrome plating, Zinc die castings, Anodized Aluminium.
History of SST The first testing method was developed in 1910. It was not standardized for 30 years. It was done after 30 years on the release of ASTM B117 in 1939. The earliest standard varies significantly in which the level of salt is 20%. This concentration of salt was high and it causes problems in accurate test results. Later, it was discovered that reducing the salt concentration to 5% would accelerate the test result without any negative drawbacks. So, in 1954 the ASTM standard was revised with a concentration of 5% NaCl.
Material required for Salt Spray Test
The following material can be salt spray tested.
- ED coating parts
- Painted Parts
- Phosphate Parts
- Powder Coating Parts
- Zinc Plating and Zinc Alloy Platings
Preparation of solution for SST
Preparing a solution for the SST chamber is carried out very easily. All you have to do is just take fresh DM water, add 5% NaCl, and mix it well. Most importantly, check the pH of the DM water before dissolving in the NaCl.
Parameters required for Salt Spray testing
The following parameters are required to conduct a salt spray test.
- pH: 6.5-7.2
- Temperature of test chamber: 35+-1degree
- Spray Pressure: 0.7-1.8kg/cm2
- Temperature of saturated tank: 47+-1degree
- Fog Collection: 0.85-2.0ml/h for 80cm2.
The Salt Spray Chamber by Effective Lab India is designed for corrosion testing to evaluate the resistance of materials and surface coatings to salt spray (fog) at elevated temperatures. This chamber is essential for quality control and research purposes in various industries. If you have any questions or need further assistance, please feel free to reach out to us: Email: info@effectivelabindia.com Phone: +91 9555515525
FAQ
1. What is a Salt Spray Chamber?
A Salt Spray Chamber is a testing device used to evaluate the corrosion resistance of materials and coatings by exposing them to a salt-laden mist at elevated temperatures. This simulates the conditions that materials might face in a marine or industrial environment.
2. How does a Salt Spray Chamber work?
A Salt Spray Chamber works by atomizing a salt solution (usually a 5% sodium chloride solution) and spraying it onto the test samples inside the chamber. The chamber maintains a constant temperature, usually around 35°C, to accelerate the corrosion process.
3. What standards are followed in Salt Spray Testing?
Salt Spray Testing generally follows international standards such as ASTM B117, ISO 9227, and JIS Z 2371. These standards specify the test conditions, including the concentration of the salt solution, temperature, and duration of the test.
4. What are the applications of a Salt Spray Chamber?
Salt Spray Chambers are widely used in industries such as automotive, aerospace, marine, and construction to test the durability and corrosion resistance of metals, coatings, and surface treatments.
5. How to maintain a Salt Spray Chamber?
Regular maintenance of a Salt Spray Chamber includes cleaning the chamber, checking and refilling the salt solution, inspecting and replacing nozzles, and ensuring that the temperature and humidity controls are functioning correctly. Proper maintenance ensures accurate and reliable test results.
6. What are the benefits of using Effective Lab India’s Salt Spray Chamber?
Effective Lab India’s Salt Spray Chambers are designed for high precision and reliability. They offer features such as robust construction, easy operation, consistent test conditions, and compliance with international standards. These benefits make them an excellent choice for accurate corrosion testing.