Standing Up to Environmental Conditions
Corrosion testing is performed to determine the susceptibility of materials to corrosion under certain environmental conditions. Corrosion can be costly and devastating, so testing makes sense before damage occurs. Since all metals and alloys are susceptible to corrosion under some environmental conditions, corrosion testing can help compare materials, estimate the life of products, and determine if a material will meet the needs of its intended application.
The corrosion specialists at Laboratory Testing provide many types of corrosion analysis to help you select the most appropriate materials and protective treatments for your products including a salt spray test, humidity test and accelerated intergranular corrosion testing. Although corrosion testing is frequently performed during product design, it can also be extremely helpful in providing answers when an unexpected corrosion problem occurs with a product in service. We utilize corrosion analysis and other relevant materials testing to identify corrodents and environmental factors responsible for corrosion attack or perform a full root cause failure analysis.
Accelerated Intergranular Corrosion Testing can detect the susceptibility of a material to one or more forms of corrosion in a relatively short period of time. Our specialists also perform Salt Spray / Salt Fog, Humidity, Temperature, Passivation Testing and more corrosion testing according to ASTM and other industry standards to help determine the impact of environmental conditions on our customers’ materials and products.
Corrosion Testing Capabilities at LTI
- Salt Spray Test / Salt Fog (ASTM B117 Testing)
- Humidity Test (AMS 2700)
- Passivation Test (ASTM A380, ASTM A967 & MIL-STD 753 Methods 102, 103)
- Alpha Case
- Susceptibility to Intergranular Attack in Austenitic Stainless Steels (ASTM A262 Practice A, B, C, E, F)
- Susceptibility to Intergranular Corrosion in Wrought, Nickel-Rich, Chromium-Bearing Alloys (ASTM G28 Methods A, B)
- Detrimental Intermetallic Phase in Duplex Austenitic/Ferritic Stainless Steels (ASTM A923 Method C)
- Aluminum Exfoliation Test (ASTM G34)
- Pitting and Crevice Corrosion Resistance of Stainless Steels and Related Alloys (ASTM G48 Methods A, B, C, D, E, F)
- Visual Assessment of Exfoliation Corrosion Susceptibility of 5XXX Series Aluminum Alloys (ASSET Test) (ASTM G66-99(2005)e1)
- Susceptibility to Intergranular Corrosion of 5XXX Series Aluminum Alloys by Mass Loss After Exposure to Nitric Acid (NAMLT Test) (ASTM G67-04)
The Test Processes
Our salt spray test, also known as salt fog test, is performed according to the ASTM B117 testing method. This includes testing of a material in a controlled corrosive environment which has been used to produce relative corrosion resistance information for specimens of metals and coated metals. At LTI, the test is run in a new salt spray chamber with precision temperature control.
Our environmental chamber is ideal for ensuring the reliability of products such as electronic items through exposure to thermal cycling, fast temperature cycling, and extreme temperature and humidity conditions. Temperature testing is available in the range of -94°F to +356°F (-70°C to +180°C). The humidity test is in the range of 10% to 95% relative humidity and simulates a damp environment. The humidity and temperature working ranges comply with DIN, ISO, MIL, IEC, DEF and ASTM testing standards.
Passivation testing looks at surface passivity of corrosion-resistant steel parts. It may also be useful in determining if there is a need for passivation.
A Scanning Electron Microscopy and Energy Dispersive X-ray Spectrometry (SEM/EDS) system at Laboratory Testing provides extensive corrosion testing capabilities. The EDS is capable of analyzing corrosion deposits to identify the corrosive agent. The SEM EDS equipment is particularly helpful in microanalysis and analyzing small areas of interest on samples. The SEM provides magnification to 300,000x and high resolution imaging of samples.
- AMS 2700
- ASTM A262 Practice A, B, C, E, F
- ASTM A380
- ASTM A923 Method C
- ASTM A967
- ASTM B117
- ASTM G1
- ASTM G28 Methods A, B
- ASTM G34
- ASTM G48 Methods A, B, C, D, E, F
- ASTM G66-99(2005)e1
- ASTM G67-04
- MIL-STD 753 Methods 102, 103