Analisis Tingkat Kecepatan Korosi Besi dengan Menggunakan Sinar Gamma
Abstract: In order to
examinate rate of iron corrosion, we have conducted a research using apparatus
Geiger-Muller Tube with sources radiation standard Co-60 as a source of Gamma
ray. The samples, iron plate with diameter 2 cm and thichness 0.13 cm, were
corroded by various media of corrosion i.e. water (H2O), solution of salt
(NaCl) and sulphuric acid (H2SO4) with interval time corrosion ± 5 days, 10
days, 15 days, 20 days, and 25 days. Firstly, we estimated intensity of Gamma
ray before (Io) and after (I) passing through the samples, and then we
evaluated the absorption coefficient of samples. We obtained that equation of
absorption coefficient is A (water) = 0.0014t – 0.4608; R2 = 0.9184, A (salt
solution) = 0.0015t – 0.4589; R2 = 0.8886 and A (sulphuric acid) = 0.0017t –
0.4532; R2 = 0.780. We calculated that the rate of corrosion forwater, salt
solution and sulphuric acid is 0.0014 gr/cm2/day, 0.0015 gr/cm2/day and 0.0017
gr/cm2/day respectively. The result shows the rate of corrosion caused by
sulphuric acid larger than corroded by salt and water. In addition, the rates
of corrosion of iron depend on interval time of corroding iron plate and media
of corrosion. Another factor which may be related to rate of iron corrosion such
as temperature, humidity and concentration of media of corrosion should be considered
for next future.
Penulis: Ashar Muda Lubis dan
Supiyati
Kode Jurnal: jpfisikadd090069
