Evaluation of the inhibitory effect of methylene blue dye on the corrosion of aluminium in hydrochloric acid

被引：190

作者：

Oguzie, EE

Okolue, BN

Ebenso, EE

Onuoha, GN

Onuchukwu, AI

机构：

[1] Fed Univ Technol Owerri, Dept Chem, Electrochem & Mat Sci Res Lab, Owerri, Nigeria

[2] Univ Calabar, Dept Pure & Appl Chem, Calabar, Nigeria

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2004年 / 87卷 / 2-3期

关键词：

aluminium; methylene blue; inhibition efficiency; synergism; adsorption isotherm;

D O I：

10.1016/j.matchemphys.2004.06.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of methylene blue (MB) dye on the electrochemical corrosion of aluminium in HCI solutions was studied using gravimetric techniques at 303 and 333 K. The results indicate that MB acts as an inhibitor in the acidic corrodent. The inhibition efficiency was observed to be sensitive to acid concentration and increased with an increase in MB concentration but decreased with rise in temperature. Synergistic effects increased the inhibition efficiency on addition of halides namely: KCl, KBr and KI. The experimental data were corroborated with the Langmuir as well as Flory-Huggins adsorption isotherms. The activation energy values of 19.39 and 30.53 kJ mol(-1) calculated for the corrosion process in the absence and presence of MB, respectively, suggest that the inhibitor molecules are physically adsorbed on the Al surface. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：394 / 401

页数：8

共 26 条

[1] The inhibition of 4-(2′-amino-5′-methylphenylazo) antipyrine on corrosion of mild steel in HCl solution [J].

Abd El Rehim, SS ;

Ibrahim, MAM ;

Khalid, KF .

MATERIALS CHEMISTRY AND PHYSICS, 2001, 70 (03) :268-273

[2]

ALMAYOUF AM, 1996, CORROS PREVENT CONTR, V6, P70

[3]

[Anonymous], T SAEST

[4]

Ashassi-Sorkhabi H, 2000, ACTA CHIM SLOV, V47, P507

[5]

BELOGLAZOW SM, 1993, PROGR UNDERSTANDING, V2, P908

[6]

Bhajiwala HM, 2001, B ELECTROCHEM, V17, P441

[7]

Ebenso EE, 2003, B ELECTROCHEM, V19, P209

[8]

Ebenso EE, 2002, B ELECTROCHEM, V18, P551

[9] Effect of molecular structure on the efficiency of amides and thiosemicarbazones used for corrosion inhibition of mild steel in hydrochloric acid [J].

Ebenso, EE ;

Ekpe, UJ ;

Ita, BI ;

Offiong, OE ;

Ibok, UJ .

MATERIALS CHEMISTRY AND PHYSICS, 1999, 60 (01) :79-90

[10]

EBENSO EE, 2002, MATER CHEM PHYS, V71, P62

← 1 2 3 →