caa a22 4500 445844337 CHVBK 20180317145354.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s11085-011-9234-x doi (NATIONALLICENCE)springer-10.1007/s11085-011-9234-x Crevice Formation on the Surface of the Simple and Ti-Modified Aluminide Coatings Under a Fused Na2SO4 Salt Film [Elektronische Daten] [Farhad Shahriari, Ahmad Saatchi, Fakhreddin Ashrafizadeh] The hot-corrosion behavior of simple and Ti-modified aluminide coatings on nickel-based superalloy B-1900 was investigated. The sodium sulfate salt deposition rate was 1mg/cm2 for each 32h at 900°C. Although the mass change data showed relatively more durability for the modified coatings, morphological characterization of the specimens and corrosion products revealed similar degradation mechanisms for all coatings studied. The base of a that pit developed during hot corrosion initiation had a low oxygen pressure and the pits grew perpendicular to the surface to create deep crevices. The growth and joining of these crevices caused large pieces of the coating to be lost, exposing the bare substrate to the fused salt at longer times. The initiation and advancement of the crevices are discussed and a mechanism is proposed to explain this type of hot corrosion morphology. Springer Science+Business Media, LLC, 2011 Ti-modified aluminide coating nationallicence Hot corrosion nationallicence Crevice formation mechanism nationallicence Sodium sulfate nationallicence Shahriari Farhad Steel Institute, Isfahan University of Technology, P.O. Box 84155-315, 84156-83111, Isfahan, Iran aut Saatchi Ahmad Department of Materials Engineering, Isfahan University of Technology, 84156-83111, Isfahan, Iran aut Ashrafizadeh Fakhreddin Department of Materials Engineering, Isfahan University of Technology, 84156-83111, Isfahan, Iran aut Oxidation of Metals Springer-Verlag 76/1-2(2011-08-01), 57-65 0030-770X 76:1-2<57 2011 76 11085 https://doi.org/10.1007/s11085-011-9234-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11085-011-9234-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Shahriari Farhad Steel Institute, Isfahan University of Technology, P.O. Box 84155-315, 84156-83111, Isfahan, Iran aut NATIONALLICENCE 700 1- Saatchi Ahmad Department of Materials Engineering, Isfahan University of Technology, 84156-83111, Isfahan, Iran aut NATIONALLICENCE 700 1- Ashrafizadeh Fakhreddin Department of Materials Engineering, Isfahan University of Technology, 84156-83111, Isfahan, Iran aut NATIONALLICENCE 773 0- Oxidation of Metals Springer-Verlag 76/1-2(2011-08-01), 57-65 0030-770X 76:1-2<57 2011 76 11085 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer