[Soldering of a low gold content alloy (46%)]

This is the third part of a research about a low gold content alloy (Au 46%, Pd 4%, Ag 40%, Cu and Zn), involving the study of soldered joints. Transverse test was used to evaluate mechanical resistance of bars joined by soldering. Comparativily were considered the following "soldering" condution: entire bars without investing and without soldering; entire bars with investing and without soldering but simulating thermal cycle and quenched in water after one and five minutes; with investing, soldering and quenched in water after one and five minutes. Of the "soldered" alloy were obtained also Brinell and Vickers hardness numbers. Corrosion resistance test was performed for six month at vapors of acetic acid solution, saturated with hydrogen sulfide. From the results it was possible to conclude: the soldered joints of the alloy reach good corrosion resistance; the soldered joints do not become brittle; thermal cycling as elapsed from soldering procedure and water quenched after five minutes increases the strength of the alloy and the soldered joints.