Corrosion inhibition of carbon steel in the near neutral media by blends of tannin and calcium gluconate

Lahodny-Šarc, Olga; Kapor, Frankica

doi:10.1002/1521-4176(200204)53:4<264::aid-maco264>3.0.co;2-o

Cited by 29 publications

(17 citation statements)

References 6 publications

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“…Tannins, complex mixtures of polyphenolic compounds extracted from plant materials, have continued to provoke research interests in their use as corrosion inhibitors in aqueous media [1,2], components of rust converters [3], pigments in paint coatings [4], pretreatment of reinforcement steel in concrete [5], chemical cleaning agents for removing iron deposits [6] and cement paste coloring in concretes [7] as well as many other applications. They are chemically divided into two classes: hydrolysable tannins and condensed tannins.…”

Section: Introductionmentioning

confidence: 99%

Mössbauer and infrared spectroscopy as a diagnostic tool for the characterization of ferric tannates

Jaén

Navarro

2009

Hyperfine Interact

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Fourier transform infrared spectroscopy and Mössbauer spectroscopy are use for the characterization and qualitative analysis of hydrolysable and condensed tannates. The two classes of tannates may be differentiated from the characteristic IR pattern. Mössbauer proof that a mixture of mono-and bis-type ferric tannate complexes, and an iron(II)-tannin complex are obtained from the interaction of hydrolysable tannins (tannic acid and chestnut tannin) and condensed tannins (mimosa and quebracho) with a ferric nitrate solution. At pH 7, a partially hydrolyzed ferric tannate complex was also obtained.

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Section: Introductionmentioning

confidence: 99%

Mössbauer and infrared spectroscopy as a diagnostic tool for the characterization of ferric tannates

Jaén

Navarro

2009

Hyperfine Interact

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“…Zinc gluconate is used for common cold treatment and for better wound healing. A number of recent studies have been carried out on the efficiency and the mechanism of the gluconate corrosion inhibition either as single compound or in a mixture [2,3,[7][8][9][10][11][12][13][14][15]. The efficiency of gluconate inhibition depends on inhibitor concentration, pH value and chemical composition of investigated solution, the nature of cations introduced in the solution as gluconate or already present in water and the state of the metal surface [11,16].…”

Section: Introductionmentioning

confidence: 94%

Corrosion inhibition of carbon steel in various water types by zinc gluconate

Ivušić¹,

Lahodny-Šarc

Alar

2013

Materialwissenschaft Werkst

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The effect of zinc gluconate on the corrosion inhibition of carbon steel DIN RSt 37-2 in various water types has been evaluated using Tafel polarization and scanning electron microscopy techniques. Experiments were performed using 6 types of water, namely, soft tap water from Dubrovnik region, hard tap water from Zagreb region, 3.5% sodium chloride solution, sea water from Dubrovnik region, biologically inert sea water from Dubrovnik region and demineralized water. The concentration of zinc gluconate varied from 0.1 to 3 gl -1 . The results show that substantial corrosion inhibition using zinc gluconate can be obtained with low concentrations in tap waters along with demineralized water and with moderate concentrations in 3.5% sodium chloride solution and sea waters. EDX analysis confirmed the presence of zinc ions which are incorporated in the protective layer of carbon steel specimen. The corrosion inhibition is predominately obtained by anodic mechanism.Keywords: carbon steel / corrosion inhibition / zinc gluconate / sea water / tap water / Die Wirkung von Zinkgluconat auf die Korrosionsinhibierung des Kohlenstoffstahls DIN RSt 37-2 in verschiedenen Wasserarten anhand der Tafel Polarisation und der Rasterelektronenmikroskopie wurde untersucht. Die Experimente wurden unter Verwendung von 6 Arten von Wasser durchgeführt, nämlich: weiches Leitungswasser der Dubrovnik Region, hartes Leitungswasser der Zagreb Region, eine 3,5% Natriumchloridlösung, Meerwasser der Dubrovnik Region, biologisch inertes Meerwasser der Dubrovnik Region und demineralisiertes Wasser. Die Konzentration von Zinkgluconat variierte von 0,1 -3 bis gl -1 . Die Ergebnisse zeigten, dass schon bei niedrigen Konzentrationen von Zinkgluconat in Leitungswasser und demineralisiertem Wasser eine erhebliche Korrosionsinhibierung erreicht werden kann, während für die Inhibierung im Meereswasser, inerten Wasser und in einer 3,5% Natriumchloridlösung, eine etwas höhere Konzentration des Zinkgluconat erforderlich ist. Die EDX-Analyse bestätigte die Anwesenheit von Zink Ionen, die vermutlich in der Schutzschicht des Kohlenstoffstahles inkorporiert sind. Die Korrosionsinhibierung wird überwiegend durch einen anodischen Mechanismus hervorgerufen.

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“…This will give us anodic, cathodic or a mixed type of inhibition. Most of the potential corrosion inhibitors possess an active functional group, such as a nitro (-NO2) or a hydroxyl (-OH) [4,5] group. The inhibition of steel corrosion by acids was previously studied by some sulfur-and/or nitrogencontaining compounds [6].…”

Section: Introductionmentioning

confidence: 99%

The Inhibitive Effect of Gnetum africanum, Gongronema latifolium and Chromolena odaratum Extracts on Corrosion of Stainless Steel in 1 M HCl and H2SO4 Solutions

Obiukwu

Opara

Asoluka

2016

ILCPA

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Abstract. Extract of various plants; Okazi leaf (Gnetum africanum), Utazi leaf (Gongronema latifolium) and Elizabeth leaf (Chromolena odaratum) was investigated as corrosion inhibitor of stainless steel in 1M HCL and H 2 SO 4 using conventional weight loss. Results were obtained at intervals of 24, 48, 72 and 96 hours respectively. The corrosion rate and inhibition efficiency were calculated. The results revealed that all the plant extract act as inhibitors in the acid environments while Elizabeth leaf (Chromolena odaratum) proved to be better corrosion inhibitor than Okazi plant (Gnetum africanum) and Utazi plant (Gongronema latifolium) extract as it recorded the highest inhibition efficiency of 90.95% in 1M HCL for 20 ml concentration.

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Corrosion inhibition of carbon steel in the near neutral media by blends of tannin and calcium gluconate

Cited by 29 publications

References 6 publications

Mössbauer and infrared spectroscopy as a diagnostic tool for the characterization of ferric tannates

Mössbauer and infrared spectroscopy as a diagnostic tool for the characterization of ferric tannates

Corrosion inhibition of carbon steel in various water types by zinc gluconate

The Inhibitive Effect of <i>Gnetum africanum</i>, <i>Gongronema latifolium</i> and <i>Chromolena odaratum</i> Extracts on Corrosion of Stainless Steel in 1 M HCl and H<sub>2</sub>SO<sub>4</sub> Solutions

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