ISSN:0947-5117    

DOI:10.1002/maco.19830340411

出版商:WILEY‐VCH Verlag GmbH    

年代:1983

数据来源: WILEY

ISSN:0947-5117    

DOI:10.1002/maco.19830340412

出版商:WILEY‐VCH Verlag GmbH    

年代:1983

数据来源: WILEY

ISSN:0947-5117    

DOI:10.1002/maco.19830340413

出版商:WILEY‐VCH Verlag GmbH    

年代:1983

数据来源: WILEY

ISSN:0947-5117    

DOI:10.1002/maco.19830340414

出版商:WILEY‐VCH Verlag GmbH    

年代:1983

数据来源: WILEY

ISSN:0947-5117    

DOI:10.1002/maco.19830340416

出版商:WILEY‐VCH Verlag GmbH    

年代:1983

数据来源: WILEY

ISSN:0947-5117    

DOI:10.1002/maco.19830340417

出版商:WILEY‐VCH Verlag GmbH    

年代:1983

数据来源: WILEY

摘要:

AbstractDie über 10000 h in strömendem Natrium bis zu 973 K und Strömungsgeschwindigkeiten bis 5 m/s eingesetzten Probenstrecken und Wärmetauscher eines Natriumhochtemperatuprüfstands wurden auf die langzeitigen Korrosionseffekte unter auflösenden Bedingungen und die Abscheidungsphänomene im Temperaturefälle nachuntersucht, wobei neben morphologischen und metallografischen Methoden vor allem chemisch‐analytische Verfahren zur Ermittlung von Konzentrationsgradienten angewandt wurden. Den eingesetzte stabilisierte austenitische Stahl X8 CrNiMoNb 1613 zeigte sich den Ansprüchen der Hochtemperaturbeanspruchung durch Natrium

ISSN:0947-5117    

DOI:10.1002/maco.19830340402

出版商:WILEY‐VCH Verlag GmbH    

年代:1983

数据来源: WILEY

摘要:

AbstractEllipsometry has been used to study the influence of Benzylamine, Benzotriazole and Hexamethylenetetramine on the growth of anodic oxides on iron and on AISI 304 stainless steel in borate‐buffer solutions.On iron, a limitation of the growth‐rate has been observed for these substances all over the passive potential range. On AISI 304 steel, when the electrode potential exceeds 400 mV (SCE), an increase of the anodic oxide growth‐rate was found in the presence of the organic substances. Adsorption on the oxide film, according to the interpretation given by Pearson, is disc

ISSN:0947-5117    

DOI:10.1002/maco.19830340403

出版商:WILEY‐VCH Verlag GmbH    

年代:1983

数据来源: WILEY

摘要:

AbstractThe aim of the study was to relate the general corrosion behaviour of CuNi 10‐alloys in seawater with its iron content and microstructure. To that end the microstructure of four commercial alloys with various Fe‐contents (1.20‐1.78%) and there laboratory melted alloys with various Fe‐contents (1.5–2.5%) were investigated in the as delivered state and after three different heat treatments. Samples of these alloys were exposed to flowing natural seawater. During exposure electrochemical measurements were performed. After exposure the weight loss was determined. Moreover, for a number of samples the corrosion products were analysed by means of electron microprobe analysis. Irrespective of the Fe‐content, the presence of discontinuous precipitates in the laboratory melted alloys turned out to be detrimental with regard to general corrosion. To a less extent this also holds for alloys with high concentrations of continuous precipitates, as observed for iron contents of 2 and 2.5%. The precipitate free alloys as well as the ones containing low concentrations of continuous precipitates because of low Fe‐concentrations (<1.5%Fe) do show a good corrosion behaviour. The corrosion behaviour of commercial CuNi 10 Fe in the as received condition was generally comparable with that of laboratory melted alloys with continuous precipitates. The corrosion rates of the former do not exceed those of the latter, which are very low for practical applications. Finally the corrosion behaviour of five laboratory melted CuNi5 alloys, containing up to 4% fe in solution, was investigated. It turned out that their reciprocal polarisation resistance in the steady state situation is lower than those for the CuNi

ISSN:0947-5117    

DOI:10.1002/maco.19830340404

出版商:WILEY‐VCH Verlag GmbH    

年代:1983

数据来源: WILEY

摘要:

AbstractDie Untersuchung der Beeinflussung von baupraktischen Spannstählen durch Wasserstoff ergibt, Daß in der Praxis nachweislich infolge Wasserstoffeinwirkung schadhaftes Material durch einen gesteigerten Wasserstoff‐Diffusionskoeffizienten bereits im ungespannten Zustand gekennzeichnet ist. Hierfür erweisen sich spezifische Struktureinflüsse von inneren Oberflächen mit Störstellen, selbst nur von reinen Eisenoberflächen, als entscheidend. Tritt Wasserstoff mit ihnen in Wechselwirkung, kann er allein dort örtlich den Metallzusammenhalt lockern und so beim gespannten Stahl Rißbildung e

ISSN:0947-5117    

DOI:10.1002/maco.19830340405

出版商:WILEY‐VCH Verlag GmbH    

年代:1983

数据来源: WILEY