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This paper describes corrosion rate prediction models for the main corrosion mechanisms of carbon steel in Exploration and Production service. The models succeed earlier work by De Waard, Milliams, and Lotz.
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This paper will demonstrate the fundamental corrosion issues encountered in Sulfur Recovery Units. It will address the Claus process chronic corrosion problems such as sulfidation, sour environment cracking, weak acid corrosion, etc.
The new passivation mechanism in steam-assisted gravity drainage (SAGD) process is discussed through theoretical approach in this paper. A corrosion mitigation program was implemented that included the pigging both slug and batch corrosion inhibitors chemistry analysis corrosion rate (CR) monitoring and non-destructive tests.
An operator in North America discovered an internal corrosion failure in a wet gas system directly below the point of injection of a water-soluble corrosion inhibitor (CI). Tests using low shear rotating cage autoclaves and a dual autoclave system were performed as a corrosion screening method.
Ta coatings were cold sprayed onto carbon steel and exposed to two different solutions: (i) synthetic seawater and (ii) aqueous 15% HCl to test the suitability to mitigate the corrosion of the substrate.
Electrochemical measurements were obtained from steel-reinforced concrete samples immersed in 0.5 M H2SO4 medium, for simulating industrial/microbial environment, to assess the corrosion-inhibition effects of two admixtures.
Autoclave tests were performed in CO₂, O₂, and H₂O at 8 MPa at 50°C and 245°C, (heat exchanger operating conditions). Results show significant corrosion in a pressure / temperature region where H₂O saturated with CO₂ condenses on the coupons.
For a buried pipeline under dynamic DC stray current interference, field experiments of corrosion coupons were carried out at two selected test stations by burying coupons of different bare areas at two different depths.
This paper explores the use of remote monitoring systems and web-based data analysis to track corrosion rates in real time.
This case history covers the stray current corrosion control program for a natural gas pipeline operator with assets influenced by operation of a nearby direct powered light rail transit system.
Case histories where throttling down the cathodic protection was evaluated to determine the impact on reducing the AC corrosion threat. Includes the use of fast-response electrical resistance corrosion rate probe monitoring technology.
The authors have developed the monitoring method “CIPE” which determines corrosion rate using Tafel slope extrapolation method. To confirm accuracy, the results of CIPE are compared with mass losses of steel bars corroded in concrete.