Scale and Corrosion Prevention in Cooling Water Systems Part I : Calcium Carbonate
This paper presents the results of study that was undertaken to investigate the ability of a new antiscale, polyacrylamide in solving problems found in cooling water systems. The effects of the polymer on C-steel and copper dissolution in synthetic cooling water environment were studied through scale, Tafel, and Linear polarization measurements. The results obtained from this study showed that the new antiscale polymer can decrease scale build-up growth under experimental conditions. Both linear and Tafel polarization studies indicate that the polymer acted as an anodic type corrosion inhibitor on C-steel and mixed-type on copper, thus reducing metal dissolution. Morphological investigations of calcium carbonate deposits on both C-steel and copper surfaces were studied by optical microscopy. The polymer used in this study appears to have an excellent crystal modification effect on reducing calcium carbonate scale. The antiscale effect results from changes in crystallization behavior promoting bulk solution precipitation rather than formation of adherent scale.
Effect of biomolecules adsorption on oxide layers developed on metallic materials used in cooling water systems
This thesis was carried out in the frame of the BIOCOR ITN European project. Metallic materials commonly used in cooling systems of power plants may be affected by biocorrosion. The objective of this work was to study the influence of biomolecules adsorption on the electrochemical behaviour and the surface chemical composition of 70Cu-30Ni alloy, 304L stainless steel and titanium in seawater environments. The interactions between a model protein, the bovine serum albumin (BSA), and the surface of these materials were investigated. After, the influence of tightly bound (TB) and loosely bound (LB) extracellular polymeric substances (EPS) on the oxide layers was evaluated. For that purpose, electrochemical measurements (Ecorr vs time, polarization curves and EIS) were combined to surface analysis (XPS and ToF-SIMS). Comparing to the 70Cu-30Ni alloy in static artificial seawater (ASW) without biomolecules, for which a thick duplex oxide layer is shown, the presence of BSA, TB EPS and LB EPS leads to a mixed oxide layer with a lower thickness. A model is proposed to analyse impedance data obtained at Ecorr. The results show a slow-down of the anodic reaction in the presence of biomolecules with a corrosion inhibition effect by LB EPS, to a lesser extent by BSA and no detrimental effect with TB EPS. On the other hand, the effect of TB EPS and BSA on the passivation behaviour of Ti in ASW and of 304L stainless steel in chloride-free solution was studied. From EIS data, resistivity profiles within oxide films can be plotted. For both materials, oxide layers are more protective with BSA and less protective with TB EPS.
Deviant Women: Female Crime and Criminology in Revolutionary Russia, 1880-1930
This title examines the position of women in early Soviet society through the lens of deviance. After seizing power in 1917, the Bolsheviks initiated reforms aimed at abolishing the old way of life in Russia. A new Family Code liberalized marriage procedures, promoted communal living arrangements, and abolished the concept of illegitimacy. Other decrees legalized abortion, deregulated prostitution, and emancipated women. The Bolsheviks' Marxist ideology that guided these reforms was also behind the assertion that crime, an artifact of bourgeois capitalist exploitation, would disappear under socialism. As crime persisted, Soviet criminologists - a cohort of jurists, doctors, sociologists, anthropologists, psychiatrists, statisticians, and forensic experts - were charged with examining its causes and motives to determine the most effective methods to eliminate it. The problem of female crime occupied a prominent position in criminologists' studies. In explaining 'traditional' female crimes of the domestic sphere - infanticide, spouse murder, and petty theft, among others - criminologists pointed to the offenders' backwardness and ignorance, material circumstances, and even biology. Kowalsky examines the position of women in early Soviet society through the lens of deviance, exploring how Soviet criminologists understood female crime and how their attitudes helped shape the development of Soviet social and behavioral norms. "Deviant Women" looks at the emergence of criminology in early Soviet Russia, tracing the development of principles and theories - in particular of female deviance - and highlighting the ways in which criminologists were able to conduct innovative social science research under the constraints of Bolshevik ideology. Kowalsky then focuses on the analyses of female crime and criminologists' attitudes concerning sexuality, geography, and class. Concluding with a close study of infanticide, the most 'typical' crime committed by women, Kowalsky discusses the social attitudes that were revealed in the professional discussion of this crime. Historians of modern Russia and the USSR, scholars of gender studies, and those studying criminology will be fascinated by this original study.