Polyvinylpyrrolidone and polyethylenimine as inhibitors for the corrosion of a low carbon steel in phosphoric acid

Yu, Jianguo; Lin, Wen Yuan; Otieno-Alego, Vincent; Schweinsberg, D.P.

doi:10.1016/0010-938x(95)00008-8

Cited by 141 publications

(78 citation statements)

References 5 publications

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“…Polarization and weight loss studies showed that both polyvinylpyrrolidone and polyethyleneimine are effective for the inhibition of low carbon steel over a wide range of aqueous phosphoric acid solutions [14].…”

Section: +mentioning

confidence: 99%

Polymers as Corrosion Inhibitors for Metals in Different Media - A Review

Umoren¹

2009

TOCORRJ

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Several works have been done and more are on the pipeline on the influence of organic compounds containing polar functions on the corrosion inhibition of metals in various aqueous media. Corrosion inhibition by such compounds is generally attributed to their adsorption on the metal/solution interface. The specific action of an inhibitor depends on the nature of its interaction with metal surface, which causes a change in either mechanism of the electrochemical corrosion process or in the surface area available for the process. Thus, factors such as physiochemical properties of the inhibitors, the nature and surface charge of the metal, solution composition and pH are important considerations. Polymers function as corrosion inhibitors because of their ability to form complexes through their functional groups with metal ions which occupy large area and by so doing blanket the metal surface from aggressive anions present in solution.

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Section: +mentioning

confidence: 99%

Polymers as Corrosion Inhibitors for Metals in Different Media - A Review

Umoren¹

2009

TOCORRJ

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“…Near hydrochloric and sulphuric acid, phosphoric acid (H 3 PO 4 ) is a medium-strong acid, but it still shows strong corrosiveness on ferrous alloys [1][2][3]. Because of its low cost and availability, mild steel is widely employed in industry.…”

Section: Introductionmentioning

confidence: 99%

Phosphate of Aluminum as Corrosion Inhibitor for Steel in H3PO4

Alaoui¹,

Kertit²,

Bellaouchou³

et al. 2007

Port. Electrochim. Acta

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The influence of phosphate of aluminum (PA) on the corrosion inhibition of mild steel in phosphoric acid solution was studied using the weight-loss method. The electrochemical performance of the inhibitors was also investigated through potentiodynamic polarisation and EIS measurements. The inhibition efficiency of inhibitor increases with concentration to attain 84 % at 10 -2 M of PA in 0.33 M H 3 PO 4 . Polarization studies show that PA is a mixed-type inhibitor and acts both on the cathodic and anodic reactions without changing the mechanism of the hydrogen evolution reaction. The inhibition efficiency of PA is temperature-dependent in the range 298 -363 K, the associated activation energy has been determined. PA adsorbs on the steel surface according to a Langmuir isotherm adsorption model.

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“…Polymers are used as corrosion inhibitors because, through their functional groups they form complexes with metal ions and on the metal surface these complexes occupy a large surface area [13,14], thereby blanketing the surface and protecting the metal from corrosive agents present in the solution [15][16][17][18]. The inhibitive power of these polymers is related structurally to the cyclic rings, heteroatom (oxygen and nitrogen) that are the major active centers of adsorption [19,20].…”

Section: Introductionmentioning

confidence: 99%