Corrosion Testing

In our laboratory, the resistance of materials, welded joints and coatings against different corrosion mechanisms is determined using methods compliant with international standards. The principal tests in scope:

• Intergranular Corrosion Test for Austenitic/Ferritic-Austenitic (Duplex) Steels (Monypenny Strauss test): The specimen is boiled in a copper sulphate-sulphuric acid solution and then bend tested; the bent surface is examined for intergranular cracking to evaluate sensitisation (TS EN ISO 3651-2, ASTM A262).

• Intergranular Corrosion Test for Austenitic/Ferritic-Austenitic (Duplex) Steels (Huey test): The specimen is subjected to successive test periods in boiling nitric acid; mass loss is measured after each period and the corrosion rate calculated (TS EN ISO 3651-1, ASTM A262).

• Test for Detecting Detrimental Intermetallic Phase in Duplex Austenitic/Ferritic Stainless Steels: The presence of phases such as sigma, which reduce toughness and corrosion resistance, is determined; the suitability of the thermal history after production or welding is verified (ASTM A923).

• Pitting Corrosion and Crevice Resistance Test: Specimens immersed in a ferric chloride solution are evaluated for mass loss and surface pitting, verifying suitability for aggressive chloride environments (ASTM G48).

• Salt Spray Testing in Artificial Atmosphere: The corrosion resistance of metallic materials and of metallic and organic coatings is evaluated in an accelerated manner in a controlled neutral salt mist atmosphere (TS EN ISO 9227, ASTM B117).

• Copper-Accelerated Acetic Acid-Salt Spray (CASS) Testing: In a salt mist environment accelerated with acetic acid and copper chloride, the corrosion endurance of decorative coatings in particular is evaluated in a short time (TS EN ISO 9227, ASTM B368).