Influence of spraying parameters on the electrochemical behaviour of HVOF thermally sprayed stainless steel coatings in 3.4% NaCl

Stainless steel coatings obtained by High Velocity Oxygen Fuel (HVOF) were characterized using optical (OM) and scanning electron microscopy (SEM), electron probe micro-analysis, X-ray diffraction (XRD), open-circuit potential (E-OC) measurements, electrochemical impedance spectroscopy (EIS) and polarisation tests. Differences among coated steels were mainly related with the gun-substrate distance parameter (310 nm for samples A and B and 260 min for C and D). The open-circuit potential values measured for all the samples after 18 h of immersion in aerated and unstirred 3.4% NaCl solution were: - 0.334, - 0.360, - 0.379 and - 0.412 V vs. Ag/AgCl,KClsat. for samples A to D, respectively. For EIS measurements, Nyquist plots showed higher capacitive semi-circle for samples sprayed at longer distance, indicating higher corrosion resistance in NaCl solution. (c) 2005 Elsevier B.V. All rights reserved.

Na 1 Nachlass Max Horkheimer, 36 - Korrespondenzen u.a. mit Karl Menninger vom The Menninger Clinic, The Menninger Sanatorium, Topeka, Kansas (p. I 18, 188-334)

15 Brief zwischen Heinrich Meng und Max Horkheimer sowie Briefwechsel mit The Johns Hopkins Hospital, Baltimore Maryland, 1935-1940; 4 Briefe zwischen dem The Johns Hopkins Hospital, Baltimore, Maryland und Max Horkheimer, 1940; 1 Brief von Werner Münsterberger an Max Horkheimer, 13.03.1940; 44 Briefe zwischen Karl Menninger vom The Menninger Clinic, The Menninger Sanatorium, Topeka, Kansas und Max Horkheimer, 1938-1941;

Carrillo Narváez. La trayectoria del pensamiento filosófico en Latinoamérica. Quito, Editorial Casa de la Cultura Ecuatoriana, 1959, 334 p.

Fil: Torchia Estrada, Juan Carlos.

Major and trace element abundances of igneous rocks from DSDP Site 37-334

REE abundances in gabbros and peridotites from Site 334 of DSDP Leg 37 show that these rocks are cumulates produced by fractional crystallization of a primitive oceanic tholeiite magma. They may be part of a layered oceanic complex. The REE distributions in the residual liquids left after such a fractionation are similar to those of incompatible element-depleted oceanic tholeiites. The REE data indicate that the basalts which overlie the gabbro-peridotite complex, are not genetically related to plutonic rocks.