What is stress corrosion cracking testing?
Stress corrosion cracking testing with Element identifies significant threats such as external and internal corrosion, manufacturing defects, welding and fabrication defects, equipment failures, and incorrect operations, allowing you to prevent severe damage to the environment and a company’s reputation.
How is stress corrosion detected?
Two techniques are shown for detecting and locating stress corrosion cracks (SCCs). Surface maps clearly identify SCC, resolving spatial extent and geometric alignment. Laser detection approach resolves defects that are close together or close to edges.
What is SSC testing?
SSC (Sulfide Stress Cracking Test) Test standards describe many different procedures to simulate and evaluate the reaction of the material to the double effect of mechanical strenght and corrosion attack. Various H2S solutions and chloride content solutions may be used to simulate sour environments.
Which is most responsible for stress corrosion?
Chloride stress corrosion is a type of intergranular corrosion and occurs in austenitic stainless steel under tensile stress in the presence of oxygen, chloride ions, and high temperature. It is thought to start with chromium carbide deposits along grain boundaries that leave the metal open to corrosion.
What is the benefit and importance of doing stress corrosion testing with pre cracked specimen?
Precracked specimens are used to measure stress corrosion crack velocities in specific environments as a function of the stress intensity factor.
Is an effective inspection method to detect stress corrosion cracks?
The Phased Array UT is effective method to detect Stress Corrosion Cracking on heavy wall reactors compare to TOFD or any other conventional NDT techniques and however the challenges always remain on sizing and plotting the orientation.
What is HIC testing?
Element offers Hydrogen Induced Cracking (HIC) tests to accurately assess the susceptibility of your carbon and low alloy steel equipment to hydrogen induced cracking in wet H2S/sour service operating environments such as in the Oil & Gas industry. The tests are normally carried out according to NACE TM0284.
What is HIC and SSC test?
In high-strength steels cracks can arise in the zone that had been affected by heat in weld seams due to the action of mechanical stress in atmospheres containing hydrogen sulphide. The testing of materials with regard to this damage mechanism, “Sulphide Stress Cracking“ (SSC) is done in accordance with NACE TM 0177.