Kvarterne amonijeve soli, kot korozijski inhibitorji nerjavnega jekla X4Cr13 v 2,0 M H2SO4 [Elektronski vir]
Fuchs-Godec, Regina
S klasično potenciodinamsko metodo smo proučevali inhibitorski vpliv kvarternih amonijeve soli na feritno nerjavno jeklo X4Cr13 v 2 M raztopini žveplove (VI) kisline. Izbrani inhibitorji delujejo ...zaviralno tako na katodne, kot tudi na anodne reakcije. Adsorpcija Myristyltrimethylammonijevega klorida (MTACl), Cetyldimethylbenzylammonijevega klorida (CDBACl) in Trioctylmethylammonium klorida (TOMACl), je v skladu z Langmuirjevo adsorpcijsko izotermo. Dokazali smo, da je moč na podlagi karakterističnih korozijskih parametrov (▫$R_p$▫, ▫$i_{kor}$▫, ▫$i_c$▫ in ▫$Q_a$▫ ) določiti kritično miceljno koncentracijo. Če rišemo log [▫$\theta$▫/(1-▫$\theta$▫)] proti log ▫$c_{inh}$▫ dobimo linearne odvisnosti z dvema presečiščema, od katerih prvo presečišče predstavlja CMC. Velik vpliv na učinkovitost, inhibicije ima dolžina alkilne verige, ter njena "številnost". MTACl z C14 verigo kaže slabše inhibicijske lastnosti v primerjavi z CDBACl , katerega veriga vsebuje 16 C atomov (C16 ). TOMACl vsebuje tri C8 alkilne verige in ima med vsemi tremi najvišjo inhibicijsko učinkovitost (TOMACl> CDBACl> MTACl).
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