Chloride induced corrosion is recognized as a significant disease in the nation's concrete infrastructure. This paper will provide an overview of the various corrosion mitigation techniques available and then focus on two innovative methods of using discrete anodes embedded within the concrete to provide corrosion protection to existing structures.
A laboratory flow loop is used to evaluate the ability of an on-line, electrochemical, biofilm-activity probe to monitor biofilm activity in synthetic oilfield brine and correlate its activity to localized pitting corrosion. In addition, bio-traps containing porous polymer beads for trapping biomass are evaluated as a rapid means to evaluate biofilm community structure.
The internal corrosion of pipeline steel in the presence of hydrogen sulfide (H₂S) represents a significant problem in oil and gas industry. In the present study, experimentation was conducted to better resolve the direct reduction of H₂S while minimizing the effect of the anodic reaction by using a passive stainless steel working electrode.
Concrete is the second most common man-made material after potable water, yet it is a complex material that is poorly understood. Steel reinforcement is added to improve the concrete's tensile strength and ductility and is initially protected by the high concrete pH and depth of cover concrete. Eventually, due to the ingress of deleterious ions, lowering of the pH from carbonation, or electrical potential changes within the steel, corrosion will occur.