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.

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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 A262 Practice A, C and E and BS EN ISO 3651-2 Method A and ASTM G28 (Method A).


The Importance of Corrosion Testing

Corrosion typically happens when materials are exposed to an aggressive environment, which results in an attack of material.

At Rotech our team of Metallurgists specialise in carrying out the following:

Intergranular Corrosion Testing

Intergranular corrosion (IGC) refers to corrosion in between crystals or grains. When a material such as stainless steel becomes susceptible to IGC, it creates a weakness that then cracks. Material cracking in service is clearly undesirable.

There are various ways to test intergranular corrosion. These include:   

ASTM A262 – Practice E. is performed to assess attack in austenitic stainless steels.

ASTM G28 - detects the susceptibility to Intergranular Corrosion in Wrought, Nickel-Rich, Chromium-Bearing Alloys.

Pitting Corrosion Testing

Pitting corrosion is recognised by the pits that form -  although they can be hard to identify, as well as weight loss.

Susceptibility & Pitting corrosion is often tested by ASTM G48, Method A (ferric chloride testing). This method looks at Pitting Resistance of Stainless Steels and Related Alloys. A probe of the area with a needle is then carried out to show any hidden pitting.

A923 Method C*, is a Test for detecting the presence of detrimental intermetallic structures in Duplex Stainless Steels.

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.


The activities identified with * are not UKAS accredited.


For more information on corrosion testing, call 0121 514 0602 or click here to submit an enquiry online. 


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