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Sulfate-reducing bacteria (SRB) constitute a specialized group of phylogenetically diverse anaerobes that are responsible for the dissimilatory reduction of sulfate to sulfide. They are present in a variety of environments, including oil- and gas-bearing formations, soils, and domestic, industrial, and mining wastewaters (1,2). SRB are a major concern in the oil and gas industry with significant economic and safety implication.
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Microbiologically influenced corrosion (MIC) is a key risk to oil and gas infrastructure and confers great cost to asset owners. The AMPP 2021 IMPACT Canada study, which analyzed the energy, manufacturing, and mining sectors, shows the cost of corrosion in Canada is roughly $51.9 billion per year. To break this down further, MIC is estimated to make up roughly 20% of all corrosion which is roughly $10.4 billion in Canada alone, each year.
The suitability of valves in certain profiles for low-pressure pure and blended hydrogen gas service has been investigated. To achieve this, the existing standards, practices, design codes and regulations are reviewed in this paper and the input of natural gas operators, engineering companies, valve manufacturers and experts has been utilized.
The research and trials done by natural gas operators is starting to reveal that the effect of low-pressure hydrogen gas on valves is negligible and the risks involved due to hydrogen embrittlement were low.
Adhesion is a physical property that is crucial in many coatings, sealants, and adhesive applications, be it automotive, marine, or aerospace for example. Pull-off adhesion testing is an important tool in evaluating a coating’s performance, particularly while comparing pre- and post-exposure results. No matter what the application, the method for testing adhesion along with selecting the appropriate testing criteria has been the subject of multiple studies and reviews in the historical literature.
More and more High Pressure High Temperature (HPHT) sour wells are operated worldwide. Challenging material selection is required for such severe operating conditions.1,2 Very high strength materials, presenting yield strength above 896 MPa (130 ksi), are required for sustaining the pressure. Consequently, even a low amount of H2S in the gas phase may lead to a H2S partial pressure beyond the limit of 3.5 mbar (0.05 psi) established in NACE MR0175 / ISO 15156 standard.3 Indeed, both high yield strengths and partial pressures of H2S contribute to a situation where the risk of Sulfide Stress Cracking (SSC) is high. The present paper is focusing on the SSC resistance of 130 ksi minimum yield strength material developed for covering such HPHT applications.
Corrosion is responsible for the deterioration of steel structures over time. Thus, there are billions of dollars lost each year worldwide, due to leakage of materials transported in metallic pipelines, as well as the need for repair and replacement of materials. Cathodic protection is one of the main ways to minimize or even suspend the corrosive process, along with the application of protective coatings on metallic structures.
Fire is the biggest threat for the crews in aircraft, ships, submarines, and land vehicles. As a result of such threats there have been use of fire/flame retardants coatings increased exponentially to curb economic and social consequences of fire [1]. There are various types of coatings available to fight against the fire. Two classes of fire protection technologies are being used currently, 1) Fire retardant and 2) Fire resistant. Fire retardant coatings are passive fire protection coatings where such coatings can slow down the spread of the flames allowing more time for evacuation and firefighting. Fire resistant coatings typically inhibiting the flame penetration or do not ignite upon in contact with fire [2].
The development of environmentally-friendly corrosion resistant coatings is one area of recent focus in the coatings industry. For example, the Department of Defense owns more than 460,000 facilities around the world and reports the annual cost of corrosion of around $800 million. The coatings used on these structures frequently rely on older polymeric coating systems that do not meet the current requirements for environmental/regulatory concerns.
Watermain failures are not often recognized as corrosion but are usually referred to merely as “watermain breaks” because watermain pipe appears sound prior to failure. Some of the causes of watermain breaks are poor design, improper installation, surge or water hammer, soil movement, manufacturing defects, impact, internal corrosion, and external corrosion. Figure 1 shows some of the possible causes of the DI pipe.
Erosion-corrosion plays an important role in determining the durability of the erosive/corrosive slurry handling equipment. The combined action of erosion and corrosion produces a high degradation rate. Material loss rate due to erosion-corrosion is usually significantly higher than the sum of material loss rate due to pure erosion and pure corrosion acting separately. The degradation in erosion-corrosion is primarily by matrix extrusion due to abrasive particle impact.
Implementation of classification and certification programs for durable industrial and infrastructure maintenance coating systems is hindered by a lack of test protocols to reliably accelerate the aging process and estimate service lifetime. This gap in the industry also hurts development efforts toreformulate or add new color choices to existing product lines. The first problem can be addressed by performing long-term weathering testing at outdoor exposure sites in places like south Florida and Arizona, but the need to wait 5 or 10 years or longer to confirm a classification or certify a product makes such schemes difficult to implement and ultimately reduces their value.