8 research outputs found

    Alternative metallurgies reduce the cost of amine gas treating units

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    International audienceProduction facilities, including platforms or FPSO, are becoming more and more complex structures. Reducing the weight of the process units is an important challenge, and represents a huge source of costs savings. IFPEN, PROSERNAT and INDUSTEEL have evaluated two alternative metallurgies with high mechanical properties to reduce the weight of equipment of amine gas treating units (AGRU). Duplex stainless steels are considered as an alternative to more conventional austenitic stainless steel grades. High strength alloy steel ASME SA-533 type E class 2, having an UTS above 90 ksi, can be an alternate to carbon steel ASME SA-516 Gr65 type (UTS 65 ksi). The compatibility of these steel grades with amine service was checked through autoclave corrosion tests in amine solutions. Various experiments were performed in conditions representative of the bottom part of absorber and of upper section of regenerator of AGRU, with variable loadings of CO 2 and H 2 S. Study used different specimens: weight-loss coupons, four-point-bend assemblies, and U-bends. For all these tests, alternative metallurgies proved to behave at least as well as the reference ones generally considered in amine plants with no significant corrosion nor cracking. In addition to experimental tests and presentation of steel properties, the paper describes a case study of AGRU where the mass gain and CAPEX benefits are elaborated for a 75 bar, 4.5 meters diameter absorber, and for a 4.8 meters diameter, low pressure, stripper

    Adherence measurements and corrosion resistance in primer/hot-dip galvanized steel systems

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    This paper focuses on the adherence during ageing of a primer (made of polyester resins crosslinked with melamine) applied onto hot-dip galvanized (HDG) steel for coil coating application and its influence on corrosion protection. A chromium-free surface treatment, composed of fluorotitanic acid, phosphoric acid, manganese phosphate, and vinylphenol was applied on the HDG steel to obtain high corrosion resistance and high adherence of a polyester and melamine primer. The influence of the manganese phosphate on the corrosion and adherence was investigated. To measure the adherence between the metal and the primer, a three-point flexure test was set up. The adherence was then linked with corrosion resistance during ageing, using electrochemical impedance spectroscopy

    Use of anticoagulants and antiplatelet agents in stable outpatients with coronary artery disease and atrial fibrillation. International CLARIFY registry

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    Layered double hydroxides (LDHs) as functional materials for the corrosion protection of aluminum alloys: A review

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    Recent advances in steel surface treatment via novel/green conversion coatings for anti-corrosion applications: a review study

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