Macrocyclic compounds as corrosion inhibitors

被引：47

作者：

Quraishi, MA ^{[1
]}

Rawat, J ^{[1
]}

Ajmal, M ^{[1
]}

机构：

[1] Aligarh Muslim Univ, Fac Engn & Technol, Dept Appl Chem, Corros Res Lab, Aligarh 202002, Uttar Pradesh, India

来源：

CORROSION | 1998年 / 54卷 / 12期

关键词：

adsorption; Auger electron spectroscopy; hydrogen permeation; impedance; inhibition; macrocyclic compounds; potentiodynamic polarization; synergism;

D O I：

10.5006/1.3284822

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of three macrocyclic compounds on corrosion of mild steel (MS) in hydrochloric acid (HCl) was investigated using weight loss, potentiodynamic polarization, alternating current (AC) impedance, and hydrogen permeation techniques. All the investigated compounds showed significant efficiencies and reduced permeation of hydrogen through MS in HCl. Inhibition efficiency (IE) varied with the nature and concentrations of the inhibitors, temperature, and concentrations of the acid solutions. The addition of iodide ions (I-) increased IE of all the tested compounds as a result of the synergistic effect. Potentiodynamic polarization results revealed that macrocyclic compounds acted as mixed inhibitors in 1 M HCl to 5 M HCl. Adsorption on the metal surface obeyed Temkin's adsorption isotherm Auger electron spectroscopy (AES) of the polished MS surface, exposed with tetraphenyldithia-octaazacyclotetradeca-hexaene (PTAT) proved adsorption of this compound on the surface through nitrogen and sulfur atoms.

引用

页码：996 / 1002

页数：7

共 22 条

[1]

ADAM KR, 1993, J CHEM SOC DA, V7, P1013

[2]

Agarwala V.S., 1984, P INT C MET CORR, V1, P380

[3]

ASTM, 1990, ASTM, G.31-72,

[4]

AZIM SS, 1987, P 10 INT C MET CORR, P2935

[5]

BLAKE AJ, 1990, J CHEM SOC DA, V11, P3363

[6] ADSORPTION AND DIFFUSION OF ELECTROLYTIC HYDROGEIN IN PALLADIUM [J].

DEVANATHAN, MAV ;

STACHURSKI, Z .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1962, 270 (1340) :90-&

[7] ROLE OF CHLORIDE ION IN IRON CORROSION [J].

FOLEY, RT .

CORROSION, 1970, 26 (02) :58-&

[8] MACROCYCLIC CORROSION-INHIBITORS FOR STEEL IN ACID CHLORIDE ENVIRONMENTS [J].

HETTIARACHCHI, S ;

CHAN, YW ;

WILSON, RB ;

AGARWALA, VS .

CORROSION, 1989, 45 (01) :30-34

[9]

Longo F.R., 1985, P 6 EUR S CORR INH U, P155

[10]

MATHUR PB, 1982, CORROSION, V38, P17

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