Date of Award

Summer 1948

Document Type

Thesis - Restricted

Degree Name

Master of Science (MS)




The broad usefulness of pure copper is expanded by the high copper alloys which, often with no serious diminution of corrosion resistance, add to its properties a strength comparable with some steels. This is particularly true of the aluminum bronzes which are perhaps the strongest of the bronzes with tensile strengths and ductility comparable to mild steels. The writer has been working with various bronzes, particularly the aluminum bronzes for over six years. A part of this work has been concerned with the corrosion rates of aluminum bronzes in various corrosive agents. One form of corrosion was noted in which the aluminum was selectively removed from the bronze to leave behind a weak, porous mass of deposited copper. This type of corrosion is referred to as dealuminification. Dealuminification is considered one of the more destructive forms of corrosion when it occurs in certain corrosive conditions but is not ordinarily considered serious in conditions of mild exposure. An investigation of this form of corrosion appeared advisable from the standpoint of obtaining information which may be of service in either preventing or decreasing the extent to which it occurs in aluminum bronze alloys. Thus, this investigation will be chiefly concerned with those factors which may influence or control dealuminification with special emphasis on the improvement of general corrosion resistance. The factors to be considered will be the effect of various corrosion conditions, alloy composition and the addition of certain other elements to an aluminum bronze alloy.



Restricted Access Item

Having trouble?