On the utilization of aluminium and its alloys in the wine and brandy industry (5th Report)

Abstract

Corrosion tests for aluminium alloys of 1S, 2S, 3S and 52S which are normally used as anti-corrosion materials, are made in red dry wine, to examine their anti-corrosion property. This is to report the outline of the tests.The aluminium alloys are extensively attacked by red wine, and the reactions are very quick compaired with those in white dry wine which has nearly equal normal contents of alcohol and acidity with red one. It seams therefore, that it is impossible to utrilige these alloys in practice unless some special treatments such as surface treatment on alloys, or putting some agent in wine are made.It is from the test that the total acidity in wine decreases slightly (but it is not so clear) regardless of the time of dipping alloys, pH-value of wine increases its tannin content decreases, colour of wine fades, and its flavor and teste are deteriorated.