Abstracts Book - IMRC 2018

• SE1-P014
DETERMINATION OF THE FLUX CONTENT IN ALUMINUM BRAZED
HEAT EXCHANGERS FOR THE AUTOMOTIVE INDUSTRY
Edgar Vega 1 , Norma Elisa Orta Gascón 2 , Enrique Galarza 1 , Luis Santiago Ortiz Monroy 1
1 Valeo Engine Cooling, Quality Laboratory, Mexico. 2 Universidad Autónoma de San Luis Potosí,
Facultad de Ciencias Químicas, Mexico.
In the manufacture of automotive parts for vehicles built with different
aluminum alloys, typical evaluation tests for engine cooling parts are durability
(burst test, cycled pressure) and metallographic tests. Due to increase of
requirements from customers, measure of residual flux has become a quality
parameter to prevent corrosion, leak issues in warranty returns. Flux type
KxAlFy is determined by analyzing the content of potassium or fluoride
depending on the customers specification in the rinsing solution after an
internal cleanliness with des-mineralized water at certain conditions. This article
describes the procedure, differences and effect of measuring residual flux type
KxAlFy after the Valeo brazing process. Also will establish control points,
ensuring the requirements, comply with quality parameters and minimizing
failure field risks.
Keywords: aluminum alloys, burst test, residual flux type KxAlFy
Presenting authors email: edgar.vega@valeo.com