DEVELOPMENT OF A REPRODUCIBLE SCREENING METHOD TO DETERMINE THE MECHANISM AND EFFECT OF ORGANIC ACIDS AND OTHER CONTAMINANTS ON THE CORROSION OF ALUMINUM-FINNED COPPER-TUBE HEAT EXCHANGE COILS

Corbett, Richard A. ; Severance, Dave

Air-Conditioning and Refrigeration Technology Institute

关键词: Copper;    Corrosion;    21-Cr;    Miyafuji;    Pitting;   

DOI  :  10.2172/877662
RP-ID  :  DOE/OR22674/605-50010-01-Pt2
RP-ID  :  FC05-99OR22674
RP-ID  :  877662

美国|英语

来源: UNT Digital Library

【 摘 要 】

Formicary corrosion is an insidious form of localized pitting corrosion. Notoya (1997b) wrote, ?In Japan, this type of corrosion is found in approximately 10% of cases of premature failure of copper tubes.? Attack characteristically features very small surface pits which are not visible to the un-aided eye, and random directional changes in the underlying copper metal. Attack is rapid. Failures have occurred before installation, shortly thereafter, or within several years later. Objectives of this Research Project Conduct an in depth literature search on the subject of formicary corrosion. Define the corrosion mechanism. Develop a test method that will reproduce formicary corrosion. Develop a test method for screening candidate materials that could cause formicary corrosion.