Corrosion Inhibition by an Aqueous Extract of Rhizome Powder

Rajendran, Susai; Shanmugapriya, S.; Rajalakshmi, T.; Raj, A.

doi:10.5006/1.3278203

Cited by 38 publications

(22 citation statements)

References 3 publications

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“…Synergism parameters are indications of synergistic effect existing between inhibitors [24,25]. S I value is found to be greater than one indicating the synergistic effect existing between Zn 2+ of concentrations 25 ppm and 50 ppm with various concentrations of HE.…”

Section: Synergism Parameter (S Imentioning

confidence: 99%

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Inhibitory Mechanism of Carbon Steel Corrosion in Sea Water by an Aqueous Extract of Henna Leaves

Johnsirani¹,

Sathiyabama²,

Rajendran

et al. 2012

ISRN Corrosion

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The inhibition efficiency (IE) of an aqueous extract of henna leaves in controlling corrosion of carbon steel in seawater has been evaluated by weight-loss method. The weight loss study reveals that the formulation consisting of 8 mL of henna extract (HE) and 25 ppm of Zn 2+ has 94% inhibition efficiency in controlling corrosion of carbon steel in sea water. Polarization study reveals that HE and Zn 2+ system functions as mixed type inhibitor. AC impedance spectra reveal that protective film is formed on the metal surface. The nature of the metal surface has been analysed by FTIR spectra, SEM, and AFM analysis.

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Section: Synergism Parameter (S Imentioning

confidence: 99%

“…The band at 1362 cm −1 due to the Zn(OH) 2 formed on the cathodic sites of the metal surface. Thus FTIR spectral study leads to the conclusion that the protective film consists of Fe 2+ -Lawsone complex and Zn(OH) 2 [32][33][34][35].…”

Section: Analysis Of Ftir Spectramentioning

confidence: 99%

Inhibitory Mechanism of Carbon Steel Corrosion in Sea Water by an Aqueous Extract of Henna Leaves

Johnsirani¹,

Sathiyabama²,

Rajendran

et al. 2012

ISRN Corrosion

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“…Corrosion inhibition of iron in hydrochloric acid solutions by naturally occurring Henna has been investigated [10]. An aqueous extract of plant material rhizome (Curcuma Longa L) powder has been used as a corrosion inhibitor for carbon steel [11]. Aqueous extracts of Onion [12], Androgaphis panizulata [13] have been used as corrosion inhibitors.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Inhibition by Beet Root Extract

Selvi¹,

Rajendran²,

Sri³

et al. 2009

Port. Electrochim. Acta

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The inhibition efficiency (IE) of an aqueous extract of beet root (BR) in controlling corrosion of carbon steel in well water in the absence and presence of Zn 2+ has been evaluated by mass loss method. The formulation consisting of 4 mL of BR extract and 50 ppm Zn 2+ offers 98% inhibition efficiency to carbon steel immersed in well water. A synergistic effect exists between BR extract and Zn 2+ . Addition of N-Cetyl-N,N,Ntrimethylammonium bromide (CTAB) does not change the excellent inhibition efficiency of the BR -Zn 2+ system. The BR -Zn 2+ system shows excellent IE up to 7 days. Polarization study reveals that this formulation controls the cathodic reaction predominantly. AC impedance spectra reveal that a protective film is formed on the metal surface. FTIR spectra reveal that the protective film consists of Fe 2+ -betanin complex and Zn(OH) 2 . The film is found to be UV -fluorescent.

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“…Corrosion inhibition of aluminium using super hydrophobic films [11], structure and stability of adhesion promoting aminopropyl phosphonate layers at polymer/aluminium oxide interfaces [12], microbially influenced corrosion of zinc and aluminium [13], corrosion inhibition of aluminium by rare earth chlorides [14], effects of inhibitors on corrosion behaviour of dissimilar aluminium alloy friction stir weld [15], a high throughput assessment of aluminium alloy corrosion using fluorometric methods [16], surface modification for aluminum pigment inhibition [17] and filiform on 6000 series aluminium [18], have been investigated. Because of the voice raised by environmental scientists, several corrosion researchers have started using environmental friendly natural products as corrosion inhibitors [19][20][21][22]. Water extracts from leaves of date palm, phoenix dactylifera, henna, Lawsonia inermis, and corn, Zea mays, were tested as corrosion inhibitors for steel, aluminium, copper and brass in acid chloride and sodium hydroxide solutions, using weight loss, solution analysis and potential measurements [23].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Behaviour of Aluminium in the Presence of an Aqueous Extract of Hibiscus Rosa-sinensis

Rajendran¹,

Jeyasundari²,

Usha³

et al. 2009

Port. Electrochim. Acta

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The inhibition efficiency (IE) of an aqueous extract of Hibiscus rosa-sinensis (white) in controlling corrosion of aluminium at pH 12 has been evaluated by weight loss method in the absence and presence of Zn 2+ . The formulation consisting of 8 mL flower extract (FE) and 50 ppm of Zn 2+ had 98% inhibition efficiency. Polarization study revealed that this formulation functioned as cathodic inhibitor. AC impedance spectra revealed the presence of a protective film formed on the metal surface. FTIR spectra revealed that the protective film consisted of a complex formed between the active principle of the flower extract and Al 3+ .

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Corrosion Inhibition by an Aqueous Extract of Rhizome Powder

Cited by 38 publications

References 3 publications

Inhibitory Mechanism of Carbon Steel Corrosion in Sea Water by an Aqueous Extract of Henna Leaves

Inhibitory Mechanism of Carbon Steel Corrosion in Sea Water by an Aqueous Extract of Henna Leaves

Corrosion Inhibition by Beet Root Extract

Corrosion Behaviour of Aluminium in the Presence of an Aqueous Extract of Hibiscus Rosa-sinensis

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