The Electrochemical Variation of a Kind of Protein Staining and Food Dye as a New Corrosion Inhibitor on Mild Steel in Acidic Medium

<table class="fixed-width table-group" id="tab3"><tr><td><table class="table"><colgroup><col style="width:9.55em"/><col style="width:5.98em"/><col style="width:8.07em"/></colgroup><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left"><b>Immersion time (h)</b></td><td class="align_center"><b><i>K</i></b><sub><b><i>ads</i></b></sub></td><td class="align_center"><span style="width: 36.7437ptpx;"><svg height="14.0878pt" id="M38" style="vertical-align:-3.291101pt" version="1.1" viewbox="-0.0498162 -10.7967 36.7437 14.0878" width="36.7437pt" 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="M622 0V29L350 665L310 655L39 29V0H622ZM462 58H119L290 487L462 58Z"></path></g><g transform="matrix(.013,0,0,-0.013,8.638,0)"><path d="M726 301H402L391 265C504 253 508 248 493 163L482 101C470 36 436 28 395 28C264 28 180 124 180 288C180 488 322 620 471 620C552 620 639 593 654 460L691 465L702 638C672 647 589 667 496 667C225 667 21 522 21 284C21 87 166 -17 377 -17C464 -17 553 9 616 27C613 42 615 69 620 96L632 163C648 251 655 258 716 265L726 301Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,17.772,-5.741)"><path d="M339 262C339 340 273 403 193 403S48 340 48 262S113 121 193 121S339 184 339 262ZM283 262C283 210 242 168 193 168S104 210 104 262S144 356 193 356S283 314 283 262Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,21.787,3.132)"><path d="M537 112L517 145C495 121 458 95 447 95C441 95 440 104 446 137C467 254 489 355 509 440L502 444C484 442 459 446 438 450C414 454 390 457 366 457C266 457 189 408 138 367C67 310 22 211 22 117C22 36 57 -12 103 -12C144 -12 192 15 222 40C250 63 288 100 322 145H324L312 92C292 2 320 -12 348 -12C389 -12 467 28 537 112ZM371 386C371 379 353 287 338 235C318 194 224 82 188 82C172 82 164 102 164 144C164 222 198 348 266 390C281 399 291 401 310 401C328 401 355 395 371 386Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,26.893,3.132)"><path d="M569 663C575 690 575 699 561 699C538 699 465 674 362 664L357 624H366C429 626 433 619 424 570L400 446C368 455 350 457 329 457C279 457 190 416 141 378C64 318 22 212 22 118C22 34 59 -12 109 -12C142 -12 173 1 209 26C254 57 303 105 342 154H344L328 74C314 2 338 -12 363 -12C395 -12 470 9 549 101L528 134C496 102 471 87 461 87S452 99 458 129L569 663ZM384 363L359 251C326 191 238 83 194 83C177 83 163 99 163 142C163 218 198 360 262 398C270 403 282 403 299 403C318 403 356 392 384 363Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,32.328,3.132)"><path d="M396 381C396 424 350 457 289 457C241 457 192 434 152 403C107 368 87 338 87 295C87 234 153 191 207 160C265 127 277 107 277 90C277 72 260 56 229 56C190 56 140 95 98 139C87 151 81 152 58 140C39 130 22 104 22 78C22 33 94 -12 163 -12C254 -12 374 61 374 153C374 210 332 245 263 283C225 304 184 329 184 356C184 375 196 389 224 389C267 389 302 358 324 325C331 314 343 313 355 321C381 338 396 361 396 381Z"></path></g></svg><b> (kJ/mol)</b></span></td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">1</td><td class="align_center">1111111.11</td><td class="align_center">-44.44</td></tr><tr><td class="align_left">24</td><td class="align_center">3333333.33</td><td class="align_center">-47.16</td></tr><tr><td class="align_left">48</td><td class="align_center">5000000.00</td><td class="align_center">-48.17</td></tr><tr><td class="align_left">72</td><td class="align_center">5000000.00</td><td class="align_center">-48.17</td></tr><tr><td class="align_left">96</td><td class="align_center">3333333.33</td><td class="align_center">-47.16</td></tr><tr><td class="align_left">120</td><td class="align_center">5000000.00</td><td class="align_center">-48.17</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>The <i>K</i><sub><i>ads</i></sub> and <svg height="14.0878pt" id="M37" style="vertical-align:-3.291101pt" version="1.1" viewbox="-0.0498162 -10.7967 35.2287 14.0878" width="35.2287pt" 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="M600 0V24L339 665L311 657L43 24V0H600ZM497 50H107L303 539L497 50Z"></path></g><g transform="matrix(.013,0,0,-0.013,8.327,0)"><path d="M673 297H417L411 270C517 261 522 258 506 183L487 92C476 38 428 19 360 19C207 19 123 132 123 287C123 472 243 631 441 631C557 631 617 583 617 469L647 472C650 545 655 604 658 632C625 643 554 666 467 666C201 666 23 502 23 278C23 90 156 -16 339 -16C410 -16 501 6 569 24C566 43 567 70 573 101L589 183C604 259 607 262 667 271L673 297Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,17.219,-5.741)"><path d="M339 262C339 340 273 403 193 403S48 340 48 262S113 121 193 121S339 184 339 262ZM283 262C283 210 242 168 193 168S104 210 104 262S144 356 193 356S283 314 283 262Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,21.267,3.132)"><path d="M490 97L476 124C442 96 405 70 398 70C392 70 390 78 396 114C419 243 448 379 463 432L457 436C446 436 431 439 418 442C393 447 368 451 343 451C281 451 204 418 155 381C74 320 24 206 24 107C24 23 59 -12 88 -12C118 -12 155 5 191 34C236 70 290 122 328 177H330L312 84C296 0 311 -12 331 -12C355 -12 425 24 490 97ZM374 387C371 367 360 299 347 264C323 202 187 53 142 53C128 53 113 73 113 120C113 224 157 332 221 380C241 395 274 403 303 403C330 403 360 395 374 387Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,25.946,3.132)"><path d="M538 684C542 703 539 710 529 710C512 710 455 682 363 674L361 644H396C444 644 448 642 438 594L405 438C373 450 347 451 336 451C288 451 200 416 147 374C69 312 24 207 24 113C24 29 60 -12 94 -12C126 -12 156 4 196 30C231 53 296 100 346 166H348L328 81C311 10 325 -12 348 -12C380 -12 450 24 512 98L495 125C466 97 431 70 417 70C408 70 408 80 411 98L538 684ZM390 373L361 240C336 196 210 56 145 56C132 56 113 73 113 131C113 216 156 338 220 379C243 394 266 402 303 402C331 402 375 388 390 373Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,31.078,3.132)"><path d="M357 391C357 416 325 451 270 451C241 451 179 431 146 400C109 365 97 334 97 307C97 248 143 213 196 180C250 146 261 123 261 101C261 75 237 40 190 40C153 40 110 72 86 109C81 116 68 119 55 112C37 102 24 87 24 66C24 30 85 -12 137 -12C229 -12 331 62 331 140C331 189 304 218 236 260C197 284 164 309 164 346C164 381 194 400 220 400C259 400 282 380 304 350C310 342 321 339 330 344C347 353 357 372 357 391Z"></path></g></svg> values of FG-FCF found from Langmuir isotherm for each immersion times.</div>

International Journal of Electrochemistry

tab3

Table 3

Table 3: The Electrochemical Variation of a Kind of Protein Staining and Food Dye as a New Corrosion Inhibitor on Mild Steel in Acidic Medium 