الفهرس | Only 14 pages are availabe for public view |
Abstract 1- A back ground about the phenomenon of corrosion of metals in general and the corrosion of low carbon steel (0.05% C) in particular is reviewed. A swey concerning the corrosion behaviour of low carbon steel in organic acids is also given. 2. Corrosion behaviour of low carbon steel (0.05% C) was studied in stagnant solution of mono-, di-, and trichloro acetic acids in the pH range 1-4. The variation of the open circuit potential of low carbon steel (0.05% C) electrode in these solutions was followed as a function of time till steady state potential values were reached. 3. The rates of dissolution of low carbon steel (0.05% C) in different acid solutions at certain pH values estimated by two methods: a) Utilizing the galvanostatic polarization technique. b) The weight-loss of low carbon steel (0.05% C) specimen experiments. 4. The results show that the corrosion behaviour of low carbon steel (0.05%C) in mono-, di-, and trichloro acetic acids is generally the same. A linear relationship holds between the steady state potential of low carbon steel (0.05%C) and the log C of organic acid as follows: E=a+blogC The results show that in these acid solutions with low concentration values of & and 10-I M, the corrosion potential shifts towards a less negative potential values by increasing pH value from 1-3 till a maximum value. |