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

<table class="fixed-width table-group" id="tab3"><tr><td><table class="table"><colgroup><col style="width:8.64em"/><col style="width:4.35em"/><col style="width:5.33em"/><col style="width:4.98em"/></colgroup><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left">Phase</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="4"><hr/></td></tr><tr><td class="align_left">Fe</td><td class="align_center">-</td><td class="align_center">4</td><td class="align_center">-</td></tr><tr><td class="align_left">FeO (wustite)</td><td class="align_center">88</td><td class="align_center">17</td><td class="align_center">26</td></tr><tr><td class="align_left">FeO(OH)</td><td class="align_center">9</td><td class="align_center">-</td><td class="align_center">-</td></tr><tr><td class="align_left">Fe<sub>3</sub>O<sub>4</sub> (magnetite)</td><td class="align_center">2</td><td class="align_center">77</td><td class="align_center">39</td></tr><tr><td class="align_left">Fe<sub>2</sub>O<sub>3</sub> (hematite)</td><td class="align_center">1</td><td class="align_center">2</td><td class="align_center">35</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Calculated composition from XRD spectra of the samples [%].</div>

International Journal of Corrosion

tab3

Table 3

Table 3: Electrochemical Properties of Oxide Scale on Steel Exposed in Saturated Calcium Hydroxide Solutions with or without Chlorides 