Abstract
A study of the effect of atmospheric corrosion on an architectural grade of aluminium alloy was made in Christchurch, New Zealand. A range of test coupons including the ‘mill finish’ condition and identical material protected with three different thicknesses of anodic coatings has been exposed at five sites for comparison purposes. Initially the object was to produce a set of coupons that could be used to give a visual indication of the behaviour of the test coupons in a variety of local atmospheres. After exposure for twelve years, weight change data have now been processed. During this period the same range of coupons has been exposed in an accelerated corrosion rig and the results are also included for comparison.
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