Untersuchung der Korrosionsschutzwirkung von Wärmeträgern Teil 3: Elektrochemische Untersuchungen und Bewertungskriterien

Autor:	W. Stichel, I. Schmidt
Rok vydání:	1998
Předmět:	Chemistry Mechanical Engineering Metallurgy Metals and Alloys chemistry.chemical_element General Medicine Electrochemistry Copper Surfaces Coatings and Films Corrosion Anode Mechanics of Materials Aluminium Materials Chemistry Environmental Chemistry
Zdroj:	Materials and Corrosion. 49:556-568
ISSN:	1521-4176 0947-5117
DOI:	10.1002/(sici)1521-4176(199808)49:8<556::aid-maco556>3.0.co;2-a
Popis:	The third part of the report demonstrates electrochemical criteria for the assessment of corrosion protection of inhibited antifreezes on glycol base. The measurements were carried out by means of a cylinder of revolution test plant under practice oriented conditions with iron, aluminium and copper materials. The polarisation resistance, the length of passive-range and hysteresis effects at the anodic part of current density-potential curves proved to be the most useful assessment criteria. The most reliable information concerning the inhibitor efficiency is given by a combination of all three criteria. Potentiostatic tests anodic to the rest potential confirm this further. According to this criteria the tested antifreezes offer a good corrosion protection to the metals investigated.
Databáze:	OpenAIRE
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