Corrosion behavior of Si based ceramic in NaOH and Azadirachta Indica leaf juice. (Authors Nayem Hossain, A.K.M Parvez Iqbal, Md. Mahmudul Hasan)

This paper represents the corrosion behavior of silicon based ceramics that composed of silicon, aluminum, magnesium and iron in NaOH and Azadirachta indica leaf juice to obtain suitable less corrosive solution. Four different solutions such as NaOH of Ph value of 12.65; Azadirachta indica leaf juice of Ph value of 4.15; 60% NaOH,40% Azadirachta indica leaf juice of Ph value of 8.3 and 40% NaOH ,60% Azadirachta indica leaf juice of Ph value of 7.7 are considered. Firstly the weights of the four samples are taken. Then they are kept in four different solutions for 30 days. Later the weight of each sample is measured and compared with the previous weight. Weights of the samples 1, 2 and 4 are increased about 0.08%, 0.24% and 0.03% respectively while weight of sample 3 is decreased 0.11%. Finally morphological analysis of the samples is performed by SEM to investigate the abnormality in sample’s structure