Corrosion Inhibition of Mild Steel by Poly(butylene succinate)-L-histidine Extended with 1,6-diisocynatohexane Polymer Composite in 1 M HCl

<table class="fixed-width table-group" id="tab4"><tr><td><table class="table"><colgroup><col style="width:7.96em"/><col style="width:4.66em"/><col style="width:3.94em"/><col style="width:4.22em"/><col style="width:5.11em"/><col style="width:3.66em"/></colgroup><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr><td class="align_left">Conc/ppm</td><td class="align_center"><svg height="11.6836pt" id="M47" style="vertical-align:-3.29562pt" version="1.1" viewbox="-0.0498162 -8.38798 20.6301 11.6836" width="20.6301pt" 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="M303 0V28C221 34 213 39 213 125V525C213 610 221 616 303 622V650H38V622C120 616 128 610 128 525V125C128 40 120 34 38 28V0H303Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,4.433,3.132)"><path d="M396 114C349 71 317 59 274 59C216 59 123 104 123 241C123 342 180 400 246 400C283 400 317 386 348 359C355 352 361 348 366 348C378 348 401 371 402 394C402 405 398 413 385 424C369 437 337 451 294 451H293C254 451 193 434 141 394C73 342 39 277 39 198C39 90 114 -12 243 -12C303 -12 371 31 415 90L396 114Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,8.364,3.132)"><path d="M262 451C169 451 38 375 38 210C38 98 121 -12 261 -12C360 -12 481 64 481 227C481 351 386 451 262 451ZM249 414C337 414 385 320 385 204C385 70 333 25 272 25C189 25 134 117 134 241C134 355 189 414 249 414Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,12.978,3.132)"><path d="M185 344V453C137 433 92 421 41 413V386C100 378 104 375 104 310V106C104 41 97 35 33 30V0H268V30C190 35 185 41 185 107V283C206 340 240 371 267 371C282 371 296 364 310 351C316 344 325 343 336 348C357 357 369 378 369 399C369 424 345 451 310 451C262 451 219 397 187 344H185Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,16.499,3.132)"><path d="M185 344V453C137 433 92 421 41 413V386C100 378 104 375 104 310V106C104 41 97 35 33 30V0H268V30C190 35 185 41 185 107V283C206 340 240 371 267 371C282 371 296 364 310 351C316 344 325 343 336 348C357 357 369 378 369 399C369 424 345 451 310 451C262 451 219 397 187 344H185Z"></path></g></svg>/mA</td><td class="align_center"><svg height="12.6036pt" id="M48" style="vertical-align:-3.295699pt" version="1.1" viewbox="-0.0498162 -9.3079 11.8106 12.6036" width="11.8106pt" 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="M103 437H56L28 404L33 394H103V102C103 42 96 32 31 27V0H235V27C187 32 182 42 182 104V400C182 541 195 670 294 670C364 670 413 607 413 542C413 530 411 517 406 508C401 500 388 488 363 463C318 415 293 384 293 347C293 308 320 271 375 225C417 189 444 158 444 115C444 54 402 32 372 32C349 32 323 42 298 61C291 67 284 65 278 60C270 54 261 42 259 34C257 22 262 11 279 0C295 -10 315 -13 334 -13C404 -13 518 57 518 156C518 215 474 257 438 288S368 347 368 384C368 419 401 466 471 520C479 533 482 544 482 562C479 657 416 710 325 712C275 708 234 689 197 658C139 609 123 561 115 534C108 512 103 484 103 449V437Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,7.112,3.132)"><path d="M442 39L431 68C420 63 406 57 394 57C377 57 359 71 359 118V301C359 353 349 393 314 424C291 443 261 451 230 451C171 438 107 401 79 381C59 366 46 355 46 340C46 316 72 295 91 295C106 295 117 303 122 319C131 350 139 371 152 384C163 397 178 404 197 404C246 404 281 365 281 293V278C260 262 186 232 124 213C69 194 41 161 41 112C41 47 92 -12 163 -12C195 -12 243 25 283 51C288 35 293 22 308 7C319 -4 339 -12 354 -12L442 39ZM281 87C262 68 226 51 199 51C169 51 129 74 129 126C129 162 151 181 190 198C211 208 259 229 281 240V87Z"></path></g></svg>/mV</td><td class="align_center"><svg height="12.6036pt" id="M49" style="vertical-align:-3.295699pt" version="1.1" viewbox="-0.0498162 -9.3079 11.6553 12.6036" width="11.6553pt" 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="M103 437H56L28 404L33 394H103V102C103 42 96 32 31 27V0H235V27C187 32 182 42 182 104V400C182 541 195 670 294 670C364 670 413 607 413 542C413 530 411 517 406 508C401 500 388 488 363 463C318 415 293 384 293 347C293 308 320 271 375 225C417 189 444 158 444 115C444 54 402 32 372 32C349 32 323 42 298 61C291 67 284 65 278 60C270 54 261 42 259 34C257 22 262 11 279 0C295 -10 315 -13 334 -13C404 -13 518 57 518 156C518 215 474 257 438 288S368 347 368 384C368 419 401 466 471 520C479 533 482 544 482 562C479 657 416 710 325 712C275 708 234 689 197 658C139 609 123 561 115 534C108 512 103 484 103 449V437Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,7.112,3.132)"><path d="M396 114C349 71 317 59 274 59C216 59 123 104 123 241C123 342 180 400 246 400C283 400 317 386 348 359C355 352 361 348 366 348C378 348 401 371 402 394C402 405 398 413 385 424C369 437 337 451 294 451H293C254 451 193 434 141 394C73 342 39 277 39 198C39 90 114 -12 243 -12C303 -12 371 31 415 90L396 114Z"></path></g></svg>/mV</td><td class="align_center"><svg height="13.6886pt" id="M50" style="vertical-align:-5.300619pt" version="1.1" viewbox="-0.0498162 -8.38798 13.5786 13.6886" width="13.5786pt" 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="M631 18C609 24 585 35 559 65C534 91 514 117 478 169C448 214 406 281 389 313C462 346 516 399 516 485C516 545 490 590 449 616C412 641 363 650 290 650H42V622C120 615 128 612 128 527V125C128 40 120 34 38 28V0H300V28C221 34 212 40 212 125V284H244C295 284 312 272 329 244C359 195 395 133 430 84C475 19 516 -3 592 -7C603 -8 615 -8 627 -8L631 18ZM212 316V563C212 591 215 602 223 607C231 613 248 617 277 617C352 617 423 577 423 469C423 415 407 375 368 345C343 324 310 316 260 316H212Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,8.073,3.132)"><path d="M173 382V461C125 442 68 425 25 418V390C88 382 92 382 92 317V-127C92 -191 84 -199 18 -204V-235H259V-204C180 -196 173 -192 173 -120V7C188 -1 212 -11 243 -12C375 12 495 109 495 261C495 361 427 451 316 451C303 451 283 446 266 435L173 382ZM173 345C200 365 243 388 274 388C346 388 409 329 409 222C409 111 353 40 266 40C231 40 196 56 173 79V345Z"></path></g></svg>/Ohms</td><td class="align_center">%  <svg height="11.6836pt" id="M51" style="vertical-align:-3.29562pt" version="1.1" viewbox="-0.0498162 -8.38798 16.9074 11.6836" width="16.9074pt" 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="M303 0V28C221 34 213 39 213 125V525C213 610 221 616 303 622V650H38V622C120 616 128 610 128 525V125C128 40 120 34 38 28V0H303Z"></path></g><g transform="matrix(.013,0,0,-0.013,4.433,0)"><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 31 540 125 546 158L517 162Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,11.861,3.132)"><path d="M487 439H304V409C361 402 367 391 351 344C328 280 297 190 262 110C235 178 192 284 168 353C152 396 153 403 208 409V439H-1V409C54 401 61 394 85 338C133 221 179 111 224 -10H255C312 139 363 260 398 336C426 394 432 401 487 409V439Z"></path></g></svg></td></tr><tr><td class="align_left" colspan="6"><hr/></td></tr><tr><td class="align_left">Blank</td><td class="align_center">10.34e6</td><td class="align_center">29711</td><td class="align_center">51490</td><td class="align_center">0.20</td><td class="align_center">-</td></tr><tr><td class="align_left" colspan="6"><hr/></td></tr><tr><td class="align_left">200</td><td class="align_center">8.666e6</td><td class="align_center">44655</td><td class="align_center">466903</td><td class="align_center">2.25</td><td class="align_center">91</td></tr><tr><td class="align_left" colspan="6"><hr/></td></tr><tr><td class="align_left">400</td><td class="align_center">5.624e6</td><td class="align_center">37357</td><td class="align_center">549408</td><td class="align_center">2.50</td><td class="align_center">92</td></tr><tr><td class="align_left" colspan="6"><hr/></td></tr><tr><td class="align_left">600</td><td class="align_center">5.848e6</td><td class="align_center">34878</td><td class="align_center">560502</td><td class="align_center">2.78</td><td class="align_center">93</td></tr><tr class="table-tr"><td colspan="6"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>VASP parameters for corrosion of MS in 1 M HCl with different concentrations of PBSLH.</div>

International Journal of Corrosion

tab4

Table 4

Table 4: Corrosion Inhibition of Mild Steel by Poly(butylene succinate)-L-histidine Extended with 1,6-diisocynatohexane Polymer Composite in 1 M HCl 