Faculty Publications
Permanent URI for this communityhttps://idr.nitk.ac.in/handle/123456789/18736
Publications by NITK Faculty
Browse
Search Results
Item ELECTRO-CHEMICAL BEHAVIOUR OF COATED REINFORCEMENT IN CEMENT CONCRETE.(1987) Patil, B.T.; Gajendragad, M.R.; Ramchandran, T.; Ranganna, G.; Sudhaker Nayak, H.V.Concrete constructions exposed to marine environments eventually suffer from corrosion of embedded steel rods, in its advanced state, this corrosion can crack the concrete and weaken the structure. The behaviour of paint coated reinforcements in cement concrete containing different amounts of chloride through an electrode polarization technique. Coated steel rods perform better as far as corrosion of rebar is concerned.Item An Eisenelektroden wurden in angesäuerten Perchlorat und Sulfatlösungen nach Einleiten von Schwefelwasserstoff erheblich veränderte Stromdichte?Potentialkurven beobachtet. Gegenüber den reinen Lösungen ergeben sich mit Schwefelwasserstoff stark erhöhte anodische Stromdichten und bis um den Faktor 10 erhöhte Korrosionsgeschwindigkeiten. Dabei sind die anodischen Tafelgeraden log iA = f (E) mit H2S nur rund halb so steil wie ohne H2S. Wahrscheinlich wirken die SH??Ionen ähnlich wie die OH??Ionen als Katalysator der Eisenauflösung, sind aber bis fast zur Sättigung absorbiert. Copyright © 1979 Verlag GmbH & Co. KGaA, Weinheim(Über den Einfluß von Schwefelwasserstoff auf die Korrosion des Eisens in sauren Lösungen) Ramchandran, T.; Bohnenkamp, K.1979Item The stress corrosion cracking (SCC) characteristics of Zircaloy?2 sheets in methanol?0.4 vol. pct. hydrochloric acid have been studied in the annealed and cold?rolled conditions using longitudinal and transverse specimens. The times to failure for annealed longitudinal specimens were longer than those for similarly tested transverse specimens at stress levels below ?45% UTS. The cold?rolled specimens developed resistance to SCC, but failed totally by cleavage when notched, unlike annealed specimens which failed by intergranular initiation followed by cleavage. The crystallographic texture developed by cold rolling is such that the crack initiation is difficult because of quicker passivation characteristics of the crack initiating plane. The texture also gives unfavourable orientation of slip and twinning planes with respect to tensile axis. The crack initiating planes are identified with the help of X?ray pole figures. The apparent activation energy is found to be texture dependent at a given stress level. On the basis of apparent activation energy measurements, dynamic tests at constant cross?head speeds and electrochemical measurements, the mechanism of SCC is identified to be the one involving stress?aided anodic dissolution. Copyright © 1982 Verlag GmbH & Co. KGaA, Weinheim(Stress corrosion failure of Zircaloy?2 sheets in methanolic HCl solution: Role of crystallographic texture) Hebbar, K.R.; Sudhaker Nayak, H.V.; Ramchandran, T.1982Item Concrete constructions exposed to marine environments eventually suffer from corrosion of embedded steel rods. In its advanced state, this corrosion can crack the concrete and weaken the structure. The authors studied the behaviour of paint-coated reinforcements in cement concrete containing different amounts of chloride through an electrode polarization technique. Coated steel rods perform better as far as corrosion of rebar is concerned.(ELECTRO-CHEMICAL BEHAVIOUR OF COATED REINFORCEMENT IN CEMENT CONCRETE.) Patil, B.T.; Gajendragad, M.R.; Ramchandran, T.; Ranganna, G.; Nayak, H.V.S.1987