Studies on Localized Corrosion and Desalination Treatment of Simulated Cast Iron Artifacts

Abstract A simulated occluded cell was utilized to study the localized corrosion in seawater and desalination treatment in alkaline solution of simulated cast iron artifacts. After the simulated occluded cell galvanostatic test, high acidity and enrichment in chloride ions in the occluded cell were demonstrated as a result of an autocatalytic process. In addition, scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDX) indicated the degree of the localized corrosion and the enrichment in chloride ions. An investigation was also made of the chemical changes within the occluded cell during the desalination treatment; the results showed that the pH values and the amount of chloride ion removed from the occluded cell increased with the treatment time. The decrease in chloride of the corroded surface of the specimen was confirmed by EDX. The research appeared to prove that the simulated occluded cell is capable of providing useful information on the localized corrosion and desalination treatment of simulated cast iron artifacts.

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