The Effect of 3-Methyl 1-Pentyn 3-Ol on the Corrosion of Al-Si-Cu Alloys in Acid Solutions by Using SEM, EDX and AAS¹

A. Buyuksagis^a, A. A. Aksut^b, and D. Ozal^a

^a Afyon Kocatepe University Science and Art Faculty, Afyonkarahisar/TURKEY

^b Ankara University Science Faculty Chemistry Department Ankara/Turkey

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The Effect of Natural Ageing of Quickly Quenched Amorphous  Fe₇₅Si₁₂B₁₀Nb₁Cu₂ Alloys on Their Corrosion Behavior sin Acidic Sulfate Environments

V. G. Makletsov¹ and O. M. Kanunnikova²

¹Udmurt State University, ul. Universitetskaya 1, Izhevsk, 426034 Udmurtia, Russia

² Physical-Technical Institute, Ural Branch, Russian Academy of Sciences, ul. Kirova 132, Izhevsk 426000, Udmurtia, Russia

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Received April 18, 2007

Abstract — The effect of natural ageing on the electrochemical and corrosion behavior of an amorphous Fe₇₅Si₁₂B₁₀Nb₁Cu alloy in acidic sulfate environments is studied. In its shape, the polarization curve is similar to that of the alloy, which was heat treated at 400C. The ageing made the alloy brittle and unable to be soldered with acidic fluxes.

Triphenylphosphine Oxide as an Inhibitor of Acid Corrosion of Iron

Yu. P. Vishnevskaya, V. N. Rodionov, D. A. Tkalenko, and M. V. Byk

Ukrainian National Technical University (KPI), pr. Pobedy 37, Kiev-56, 03056 Ukraine

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Received May 17, 2007

PACS numbers: 81.65.Kn

Diagrams of Chemical and Electrochemical Equilibriums of NickelMolybdenum and NickelChromiumMolybdenum  Alloys

A. G. Tyurin and N. V. Markina

Chelyabinsk State University, ul. Br. Kashirinykh 129, Chelyabinsk, 454021 Russia

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Received February 27, 2006

Abstract — The phase diagram of the Ni–Mo–O system and the potential–pH diagram of the Ni–Mo–H₂O system at 25°C are composed. The electrochemical equilibrium diagram of a NiCr₁₅Mo₁₅ alloy (70%Ni + 15%Mo + 15%Cr) at the standard temperature is refined. The beneficial effect of molybdenum on the stability of the alloys' passive state is discussed in terms of thermodynamics.

Dynamics of the Development of the Subject Field Alloy Electroplating

E. G. Vinokurov¹ and V/ V. Bondar’²

¹Mendeleev University of Chemical Engineering, Miusskaya pl. 9, Moscow, 125190 Russia

²All-Russian Institute of Scientific and Technical Information, Russian Academy of Sciences (VINITI RAN), Moscow, Russia

Received November 15, 2007

PACS numbers: 82.45.Qr, 81.15.Pq