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Multiple leaks occurred with a carbon steel pipe carrying hot condensate water (300F and 140 psi). A root cause analysis was performed, including visual and metallographic examination of two failed samples chemical, analysis of weld metal and base metal and chemical analysis of water samples. Results show that flow accelerated corrosion (FAC) was the responsible mechanism leading to the failures.
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The concept of using physics-based models for corrosion monitoring is still new although corrosion monitoring by use of hardware coupons and probes is well recognized. This paper describes the application in downstream related to crude unit overhead and demonstrates how the monitoring concept can be used and its benefits.
This study presents an overview of a number of factors influencing the pitting corrosion of Ti in aggressive environments. Effects of temperature and metal cations on pitting corrosion of Ti.
Methods used to destructively determine the actual crack depths in the Pipeline Research Council International project as well as the statistical comparison of those values to the NDE measurements. We also briefly introduce advanced fracture mechanics analysis techniques that can be used to assess the safety significance of crack-like pipeline anomalies.
Electrochemical behavior of API X-80 steel materials in 3.5% wt. of NaCl solution containing different concentrations of H2S at different temperatures was studied. Potendiodynamic polarization, electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) were used to characterize the corroded API X-80 steel surface.
Recycled water quality must be evaluated to determine its potential impact on the equipment the cooling water contacts. This paper identifies the impact of various recycled water ingredients that could either be harmful or beneficial to the equipment the cooling water contacts. Case histories. Guidelines.
Self-healing coatings for corrosion protection refer to those with the ability to sense the corrosive environment and to release preloaded inhibitors from the coating matrix by a controlled mode. In this work, SiO2 nanoparticle based polyelectrolyte nanocontainers were fabricated by the LbL method to store corrosion inhibitor BTA.
In this paper the influence of various sidegroove root configurations on edge fracture Double Cantilever Beam tests and FEM analysis results were focused upon because different types of sidegroove roots are considered to change the stress concentration at the bottom of sidegroove and therefore affects the incidence of edge crack occurrence in the DCB test.
This paper will detail the environmental cracking test program and results when Alloy UNS S42028 (For applications such as high collapse liners sections in high pressure high temperature (HPHT) reservoirs) was exposed to medium density bromide based clear brine fluids at a temperature of 150oC (302oF).
Based on tubulars retrieved from Halfdan producing wells with low CO2 and H2S content an under deposit corrosion mechanism has been suggested involving multiple parameters including scale buildup microbiologically influenced corrosion (MIC) and the formation of green rust.
Fe-Cr-Ni alloys such as alloys 600 625 690 and 800 are used in steam generator tubing of nuclear power reactors. Precipitation of impurities on the steam generator tubing can lead to fouling and formation of deposits yielding a partially occluded metal surface. In this work the crevice corrosion susceptibility of these alloys is analyzed.