Electrochemical Properties of Oxide Scale on Steel Exposed in Saturated Calcium Hydroxide Solutions with or without Chlorides

<table class="fixed-width table-group" id="tab4"><tr><td><table class="table"><colgroup><col style="width:10.26em"/><col style="width:3.16em"/><col style="width:4.35em"/><col style="width:5.33em"/><col style="width:4.98em"/></colgroup><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left">Solution</td><td class="align_center">Steel</td><td class="align_center">Wustite</td><td class="align_center">Magnetite</td><td class="align_center">Hematite</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">sat. Ca(OH)<sub>2</sub>, 0M Cl</td><td class="align_center">-180</td><td class="align_center">-186</td><td class="align_center">-101</td><td class="align_center">80</td></tr><tr><td class="align_left">sat. Ca(OH)<sub>2</sub>, 0.6M Cl</td><td class="align_center">-440</td><td class="align_center">-183</td><td class="align_center">-217</td><td class="align_center">2</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Corrosion potential vs. Ag/AgCl sat. KCl [mV]: average value of two samples during 10 minutes.</div>

International Journal of Corrosion

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Table 4

Table 4: Electrochemical Properties of Oxide Scale on Steel Exposed in Saturated Calcium Hydroxide Solutions with or without Chlorides 