Corrosion–buckling interaction of 6061-T4 al alloy fixed–pinned columns : experimental study

Abstract EN

Compression buckling experimental tests was carried out for long and intermediate columns made of 6061-T4 AL- alloy.

Two different soil corrosion time were adopted i.e.30 days and 60 days using 27 samples.

The experimental analysis revealed that increasing the corrosion time negatively affects the mechanical properties of metals such as the specimens of 60 days corroded have 1.68% reduction in ultimate strength, also increasing the corrosion time reduces the critical load such as the maximum reduction was 4.24% in critical buckling load for 60 days corrosion time.

Perry-Robertson theory was applied to the experimental data and it was found that the above theory can satisfactory predicted the critical buckling load (Pcr) with a factor of safety equal to 1.2.

The ratio of corroded Pcr to dry Pcr was always less than unity.

This indication explains the effect of pitting corrosion on buckling behavior of 6061-T4 AL- alloy.