A study on the filming kinetics of corrosion inhibitors in Fe/Na2SO4 system using EQCM

Gan, Fuxing; Dai, Zhongxu; Wang, Dihua; Yao, L.-A.

doi:10.1016/s0010-938x(00)00007-x

Cited by 10 publications

(1 citation statement)

References 3 publications

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“…This behaviour is in qualitative agreement with the solvent substitution model proposed by taking into account the fact that the EQCM senses not only the mass of the electrode, but also that of the electrolyte layer immediately adjacent to the surface. 35,56 The or-Fig. 7 ATR FTIR spectra of the crystalline nicotinic acid (A) and iron electrodes in 1 mol·L -1 NaOH solution with addition of 5×10 -3 mol·L -1 (B) and 5×10 -4 mol·L -1 (C) nicotinic acid at anodic polarization potential of -0.3 V Fig.…”

Section: Adsorption Analysis With the Reqcm And Semmentioning

confidence: 99%

Adsorption Mechanism of Nicotinic Acid onto a Passive Iron Surface

Tian¹,

Li²,

Wang³

2012

Acta Physico-Chimica Sinica

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Cyclic voltammetry and in situ Raman spectroscopy were used to determine the adsorption mechanism of nicotinic acid onto passive iron film surface. Its ability to form a surface complex tends to stabilize the interstitial Fe II in Fe III states and results in the progressive development of an insoluble film. Furthermore, an analytical investigation using a rotating electrochemical quartz crystal microbalance (rEQCM) showed that the adsorption isotherms of nicotinic acid onto iron in the active and passive states followed Langmuir-Freundlich behavior from which the adsorption constant, standard free energy of adsorption, and heterogeneity could be calculated. The organic molecules attach to the film surface by chemisorption and the interstitial cations are fixed in the octahedral sites giving stable nanocrystals. These assumptions were confirmed by scanning electron microscopy (SEM) and attenuated total reflection transform infrared (ATR FTIR) spectroscopy.

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Section: Adsorption Analysis With the Reqcm And Semmentioning

confidence: 99%