Corrosion of Electronic Components by Fumes from Plastics

Stressed, clean beryllium copper wires were subjected to fumes of selected plastics and fluxes under both humid and dry environments. Macro-visual and microscopic examinations, as well as resistance value changes, were noted. PVC, and one-component RTV silicone rubber, were found to be extremely cor...

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Bibliographic Details
Main Authors: Krumbein,S. J, Raffalovich,A. J
Format: Report
Language:English
Subjects:
BERYLLIUM ALLOYS
BERYLLIUM COPPER
COPPER ALLOYS
CORROSION
CORROSIVE GASES
Electrical and Electronic Equipment
ELECTRONIC EQUIPMENT
PLASTICS
POLYVINYL CHLORIDE
Properties of Metals and Alloys
RELIABILITY(ELECTRONICS)
SILICONE PLASTICS
SOLDERING FLUXES
VAPORS
WIRE
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Summary:Stressed, clean beryllium copper wires were subjected to fumes of selected plastics and fluxes under both humid and dry environments. Macro-visual and microscopic examinations, as well as resistance value changes, were noted. PVC, and one-component RTV silicone rubber, were found to be extremely corrosive. Acetal, nylon, polyurethane foam, and teflon were found to be non-corrosive. A series of one-component RTV silivones were evaluated to determine their true curing time by measuring the complete cessation of gaseous evolution under normal laboratory conditions. Teflon emitted volatile material during exposure to high humidity at 70 C. The vapors were deposited on various surfaces where they polymerized into visible white plastic films of fluorocarbon polymer. (Author, modified-PL)