SEDL / STP / STP767-EB / STP33203S

Effect of Atmospheric Pollutant Gases on the Formation of Corrosive Condensate on Aluminum

Byrne, SC
Staff engineer and senior scientist, Alcoa Laboratories, Alcoa Center, Pa.

Miller, AC
Staff engineer and senior scientist, Alcoa Laboratories, Alcoa Center, Pa.

Pages: 15    Published: Jan 1982

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Abstract

As part of a program to develop predictive methods to estimate the long-term durability of aluminum parts, a methodology was developed to calculate the chemical composition of condensates formed on aluminum exposed to polluted air.

In this study, it is proposed that the maximum concentrations of ionic species in a condensate must be limited by the equilibrium condition established between the dissolved ions and the gases from which they formed.