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

<table class="fixed-width table-group" id="tab5"><tr><td><table class="table"><colgroup><col style="width:10.26em"/><col style="width:3.28em"/><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">0.9</td><td class="align_center">0.15</td><td class="align_center">1.8</td><td class="align_center">1.8</td></tr><tr><td class="align_left">sat. Ca(OH)<sub>2</sub>, 0.6M Cl</td><td class="align_center">0.015</td><td class="align_center">0.3</td><td class="align_center">0.7</td><td class="align_center">1.9</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Average total impedance of two samples at 1 mHz [10<sup>6</sup> Ohm.cm<sup>2</sup>].</div>

International Journal of Corrosion

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Table 5

Table 5: Electrochemical Properties of Oxide Scale on Steel Exposed in Saturated Calcium Hydroxide Solutions with or without Chlorides 