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The goal of this research was to improve the understanding of the mechanisms of cathodic protection (CP) by determining the interactions between corrosion and local chemical parameters, such as pH, under varying CP conditions, both in the absence and presence of MIC.
Carbon steel exposed to aqueous CO2 environments can be conducive to the formation of naturally protective corrosion products, namely iron carbonate (FeCO3). Understanding how FeCO3 develops across a range of conditions is a critical step in enabling the optimization of corrosion products as a natural form of corrosion mitigation. To date, most studies investigating FeCO3 development focus on near-neutral pH solutions conducive to fast precipitation while test pressures are generally atmospheric to simplify in situ electrochemical measurements.
Hydrogen embrittlement is a process that results in a decrease of the ductility of metals as a result of absorbed hydrogen. Advanced high-strength steels used in the automotive industry are materials that are considered prone to hydrogen embrittlement. Hydrogen can enter the material during steelmaking or processing steps, such as pickling, cleaning, phosphating, and electroplating.
Crevice corrosion is a geometrical-dependent type of localized attack that occurs in occluded regions where a stagnant and corrosive electrolyte is in contact with the surface of a passive metal1,2. Crevices are present in all industrial designs and can lead to major failure since their detection is often challenging3,4. Main strategies for the prevention and mitigation of crevice corrosion include design awareness and adequate materials selection5.
H2S corrosion, also known as sour corrosion, is a very serious type of metal degradation in oil and gas transmission pipelines. When H2S is present in an operating pipeline, localized corrosion is the type of attack which contributes to the most failures in oilfields, consequently, its impact on the economics of oil and gas production is indisputable. Therefore, mitigation of this type of corrosion could prevent such failures and significantly enhance asset integrity while reducing maintenance costs as well as eliminating environmental damage.
Nanolaminar or nanostructured zinc-nickel electrodeposited coatings are compliant with the composition requirements of ASTM B841 and F1941 (12 to 16% Ni: balance Zn). The term nanolaminar refers to the successive thin layered deposition of nanostructured grains (≈ 25nm); accomplished by modulating the electrodeposition into a waveform applied at defined time periods and varying current densities. Standard electroplating in contrast, applies a continuous DC current throughout the electrodeposition process, resulting in grains that while initially fine will coarsen as a function of thickness ranging to the micrometer range.
As using underground infrastructures, such as heat transport facilities continues for a long time, damage cases due to corrosion continue to occur. Therefore, it is essential to understand the corrosion behavior of underground metal facilities in terms of safety and economy. Many studies have been conducted on the corrosion of pipeline steels in soil.
Integrated computational materials engineering (ICME) has provided materials developers with new virtual tools for exploring the space of novel materials. ICME is typically rooted in computation of phase diagrams (CalPhaD) using thermodynamic databases as well as thermodynamic data that can be generated from first-principles. CalPhaD provides the opportunity to determine stable materials compositions that may have targeted properties, which can be predicted using other computational search techniques, depending on the criteria of interest.