Abstract
In order to improve the corrosion, resistance of 98% aluminium, containing 1.2% of iron. and 0.8% of silicon, magnesium, manganese, antimony, and silicon were added to the aluminium, and the weight-decrease as well as the decrease in tensile-strength or elongation of the alloys after being immersed into various corroding medium, have been measured.
For 3% NaCl solution, the addition of magnesium up to 3.5% is most effective followed by the addition of manganese (up to 1%) or of antimony (up to 0.5%).
For 1/2N HCl solution, the addition of antimony showed the best results followed by the addition of magnesium (up to 3.5%). The addition of manganese and silicon, however, showed negative effect for this acid.
For 1/2N NaOH solution, all of the additional elements showed no good results.
