Corrosion testing services calculate the materials resistance to corrosion under certain environmental conditions, such as humidity and temperature. The process is measured and analysed to determine the likelihood of corrosion.
We can test a variety of metal types, including duplex and austenitic stainless steels and wrought nickel-rich chromium-bearing alloys.
Typical standards we test are:
- Pitting and crevice corrosion testing to ASTM G48 (Method A) and ASTM A923 Method C*
- Intergranular corrosion tests (ICC) to ASTM G28 (Method A) and ASTM A262 Practice A, C and E and BS EN ISO 3651-2 Method A
The Importance of Corrosion Testing
Corrosion typically happens when materials are exposed to the air, which results in a corrosion product being created over the material. When this happens, the material is seen to be corroding, which could cause safety and performance issues.
There are a number of corrosion types, with intergranular corrosion and pitting being the greatest concern, as they are often hidden.
Intergranular Corrosion Testing
Intergranular corrosion refers to corrosion in between crystals or grains. When a material such as stainless steel loses its resistance, it creates a weak point that then cracks, which enables the corrosion to form along the affected grain boundary.
There are various ways to test intergranular corrosions (see rate corrosion testing), however, they are all designed to locate and target the weak grain boundary in order to build the boundary back.
Pitting Corrosion Testing
Pitting corrosion is recognised by the pits and spots that form - although they are hard to discover. Pitting occurs when the top layer of the material has imperfections or damage that leave it open to corrosive attack.
Pitting corrosion is often testing by ASTM G48, which has six different methods. However, Method A (ferric chloride testing) is frequently used.
Rate Corrosion Testing
Our rate service testing helps to anticipate failures that may occur. It is important to check materials for weakness or potential damages to ensure they are safe and maintain effective performance.
These testing methods are just some of the ways to ensure the safety and reliability of materials. For more information on out corrosion testing services, get in touch today
The activities identified with * are not UKAS accredited.