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Título del libro: Handbook Of Materials Failure Analysis: With Case Studies From The Electronic And Textile Industries
Título del capítulo: Assessment of failure of consumer electronics due to indoor corrosion in subtropical climates

Autores UNAM:
ARMANDO ORTIZ PRADO; VICTOR HUGO JACOBO ARMENDARIZ; RAFAEL SCHOUWENAARS;
Autores externos:

Idioma:

Año de publicación:
2019
Palabras clave:

Atmospheric corrosion; electronic materials; EPMA; SEM


Resumen:

Indoor corrosion was studied in telephones subject to normal use in various climate zones in Mexico. Visual inspection was complemented by scanning electron microscopy using energy dispersive X-ray spectrometry for a qualitative analysis of corrosion products. The methodology that was developed permits comparing real devices in uncontrolled circumstances, in contrast to the more classical approach of standard samples in a controlled environment. It allows deriving important design tips and shows that indoor corrosion is more predominant in subtropical and tropical climates than those that were found in moderate climates and atmospherically conditioned spaces. High humidity combined with strong day?night variations in temperature together with the presence of urban and industrial air pollution is the most important factor in promoting corrosion. Materials selection with an abundance of galvanic cells in the electronic assembly also promotes rapid deterioration. © 2020 Elsevier Ltd. All rights reserved.


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