Role of molybdenum in corrosion of iron-based alloys in contact with hydrogen sulfide containing solution
العنوان: | Role of molybdenum in corrosion of iron-based alloys in contact with hydrogen sulfide containing solution |
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المؤلفون: | Georgi Genchev, Elke Wanzenberg, Andreas Erbe, Christoph Bosch |
المصدر: | Materials and Corrosion. 68:595-603 |
بيانات النشر: | Wiley, 2016. |
سنة النشر: | 2016 |
مصطلحات موضوعية: | Materials science, 020209 energy, Hydrogen sulfide, Alloy, Inorganic chemistry, chemistry.chemical_element, 02 engineering and technology, engineering.material, Corrosion, chemistry.chemical_compound, Mackinawite, 0202 electrical engineering, electronic engineering, information engineering, Materials Chemistry, Environmental Chemistry, Polarization (electrochemistry), Dissolution, Mechanical Engineering, Metallurgy, Metals and Alloys, General Medicine, 021001 nanoscience & nanotechnology, Surfaces, Coatings and Films, chemistry, Mechanics of Materials, Molybdenum, engineering, Pyrite, 0210 nano-technology |
الوصف: | A sample iron molybdenum alloy with 3.4 wt% (2 at%) molybdenum, and pure iron, are exposed to hydrogen sulfide saturated saline solution for up to 56 days. In addition, their behavior under anodic polarization in the same electrolyte is investigated. The initially fast dissolution of the iron molybdenum alloy slows down significantly over time, while iron corrodes with a constant rate. The observed slow down of the corrosion rate can be described well with an exponential decay of the instantaneous corrosion rate with a time constant of (0.15 ± 0.03)/day, which implies stop in corrosion in practical terms after ≈2 weeks. Relationships are discussed between the instantaneous corrosion rate, and the time-averaged integral corrosion rate. Dissolution under anodic polarization of the iron molybdenum alloy is slower than for pure iron. While at certain times, pyrite, FeS2, is found as corrosion product, the main corrosion product is mackinawite, FeS. The latter likely contains a certain fraction of molybdenum in case of the iron molybdenum alloy. On iron molybdenum, corrosion products forming a sealing layer are observed, which slow down further corrosion. The corrosion products on iron molybdenum show better adhesion to the base material surface. |
تدمد: | 0947-5117 |
URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::752cc1d74aa23cf906644c90b7de0433 https://doi.org/10.1002/maco.201609247 |
حقوق: | OPEN |
رقم الأكسشن: | edsair.doi...........752cc1d74aa23cf906644c90b7de0433 |
قاعدة البيانات: | OpenAIRE |
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