The objective of the research summarized in this paper was to define pipeline conditions where use of the 100-mV polarization criterion may be conducive to possible SCC problems. Paper Number 01592, presented at Corrosion/2001, summarized Part 1 of the research, in which the previous research results were analyzed. In this paper, the results of the laboratory testing are presented.
Austenitic stainless steels are susceptible to caustic stress corrosion cracking (SCC) above 121°C. When sulfides are present in caustic solutions the SCC has been reported to occur at lower temperatures. This paper discusses a study of the role of sulfide in caustic solutions on SCC of austenitic stainless at T=~50°C.
Stress Corrosion Cracking in the weld and heat affected zones of Duplex Stainless Steels has been experienced in different industries. In this paper, an attempt has been made to study the various aspects of this type of corrosion, brought about by welding. Results show duplex stainless steel base metal is also susceptible.
Case Study: These lines, which are operating in about 500 Completion Risers Joints for more than 3 years exposed to a mixture of seawater, mud, oil and eventually products of acidification in the annular space , have shown good performance except for an unusual case of cracking of the Nitronic stab.
Corrosion and stress corroson cracking (SCC) susceptibility of duplex stainless steels (DSS) depend on alloy composition, microstructure and temperature. In this study the effect of sulfide containing caustic environment and material properties (DSS composition and microstructure) on the corrosion and SCC of DSS in pulping liquors (synthetic white liquor) was evaluated.
As a result of a Carbonate Stress Corrosion Cracking (CSCC) event at one refinery an investigation was made into the cause and mitigation of CSCC. This paper outlines the information obtained and the development of tools that could be utilized by other refinery fluidized catalytic cracker units (FCCU's) to better assess risk of CSCC.
Stress corrosion cracking (SCC) of carbon steel in fuel ethanol service has been observed in an increasing number of failures in the last few years. In the presence of oxygen, all of the samples evaluated in this study produced varying degrees of SCC, except for one of the producer ethanol samples. The reason for the high corrosion potential in this sample is still unknown and more detailed analysis of the sample chemical make-up is needed.
This work was undertaken to explore the possibility to extend the limits of 316L to higher temperatures. The large scale test consists of a full ring pipe which is stressed externally and exposed internally to the test fluid. The small scale tests are four-point-bend (4PB) tests in accordance with ISO15156-31 and EFC172.