The influence of sodium chlorides fog on corrosion resistance of heat exchangers used in automotive

Abstract

A B S T R A C TIn the work, the most important factors which influence on the exploitative durability of heat exchangers are classified. Particular attention was paid to the compounds of sodium chloride used in the winter season for road maintenance. In order to determine their impact on automotive heat exchanger corrosion resistance, a test of heaters in a salt chamber which imitates the conditions of their work was realized. It also allows to verify the durability of these products. To evaluate the corrosion changes, observation with the use of light microscopy and scanning microscopy SEM were made supplemented with microanalysis of chemical composition by EDS spectroscopy method. Critical areas in the heat exchangers which are mostly exposed to damage including the formation of local corrosion pits were located and analyzed. K E Y W O R D Sbrazed joints, aluminum alloys, heat exchangers, corrosion, salt fog

Archives of Metallurgy and Materials

“…although alloys of aluminum with manganese are relatively less susceptible to corrosion, the corrosion resistance may decrease with an increasing proportion of alloying elements. chemical compositions of alloys applied at cars heat exchangers are listed in TablE 1 [1]. Yoshiyuki oya et al investigated the effect of the presence of silicon (Si) on intergranular corrosion.…”