Investigation on the Relationship between the Surface Chemistry and the Corrosion Resistance of Electrochemically Nitrided AISI 304 Stainless Steel

<table class="fixed-width table-group" id="tab7"><tr><td><table class="table"><colgroup><col style="width:5.29em"/><col style="width:6.84em"/><col style="width:6.84em"/><col style="width:5.69em"/></colgroup><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left" rowspan="2">Sample</td><td class="align_center"><span style="width: 23.5922ptpx;"><svg height="11.6836pt" id="M4" style="vertical-align:-3.29562pt" version="1.1" viewbox="-0.0498162 -8.38798 23.5922 11.6836" width="23.5922pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M517 162C503 123 484 88 467 68C445 42 417 34 341 34C291 34 256 34 237 47C219 59 213 81 213 128V317H308C395 317 402 311 415 240H444V431H415C403 364 398 356 307 356H213V584C213 613 215 616 246 616H322C394 616 421 609 435 587C448 566 458 544 467 502L496 506C493 557 488 625 488 650H42V622C120 616 128 612 128 523V125C128 43 120 35 29 28V0H511C520 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348C131 387 156 416 195 416C243 416 277 378 297 317L327 325Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,15.833,3.132)"><path d="M327 325C324 350 312 408 304 433C283 442 256 451 213 451C120 451 59 391 59 320C59 243 125 210 188 181C237 158 266 136 266 93C266 52 231 24 195 24C134 24 93 81 74 148L42 143C42 106 51 37 59 23C78 8 125 -12 177 -12C257 -12 345 35 345 127C345 198 292 234 216 264C171 283 131 305 131 348C131 387 156 416 195 416C243 416 277 378 297 317L327 325Z"></path></g></svg></span></td></tr><tr class="thead"><td class="align_center">(mVAg/AgCl)</td><td class="align_center">(mVAg/AgCl)</td><td class="align_center">(<i>μ</i>A.cm<sup>−2</sup>)</td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">N</td><td class="align_center">-74 ± 9</td><td class="align_center">205 ± 26</td><td class="align_center">0.14 ± 0.04</td></tr><tr><td class="align_left">NK</td><td class="align_center">-65 ± 4</td><td class="align_center">261 ± 18</td><td class="align_center">0.08 ± 0.02</td></tr><tr><td class="align_left">Untreated</td><td class="align_center">-119 ± 26</td><td class="align_center">388 ± 18</td><td class="align_center">0.21 ± 0.02</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Electrochemical parameters determined from the potentiodynamic polarization curves.</div>

International Journal of Corrosion

tab7

Table 7

Table 7: Investigation on the Relationship between the Surface Chemistry and the Corrosion Resistance of Electrochemically Nitrided AISI 304 Stainless Steel 

Table 7 | Investigation on the Relationship between the Surface Chemistry and the Corrosion Resistance of Electrochemically Nitrided AISI 304 Stainless Steel 