Sacrificial Anode Type Al-10Si-1Mg Brazing Filler Metals for Suppression of Corrosion of Brazed 3003 Aluminum Alloy(Materials, Metallurgy & Weldability)
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Corrosion of brazed 3003 aluminum base metal was studied in an aqueous sodium chloride solution to clarify the effect of zinc and tin addition to Al-10%Si-1Mg filler metals on the protection ability of corrosion of aluminum base metal. The addition of zinc and tin to filler metal lowered the corrosion potential of filler metals and were proved to be effective to reduce the pit depth of brazed 3003 base metal. The improvement effect of zinc addition was clear in N_2 gas brazing (760 torr), however, the effect was not exerted by vacuum brazing due to zinc vaporization during brazing. Iron as an impurity element in the sacrificial anode type filler metals had no detrimental effect on the pit depth of base metals.
- Transactions of JWRI
Transactions of JWRI 15(2), 283-287, 1986-12