Corrosion control of phenylthiourea polymers on aluminium in alkaline medium

Vasanthi, B. Joy; Ravikumar, L.; Arokiyaraj, Selvaraj

doi:10.1002/maco.200704076

Cited by 12 publications

(5 citation statements)

References 17 publications

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“…In recent years, polymers are gaining more attention from the research community due to their extraordinary properties and higher efficiency towards protecting steel or aluminum corrosion even at very small level, when compared to other inorganic and organic inhibitors. It is also important to note that, the recent research was mainly focused on the aluminum corrosion protection by using polymer‐based inhibitor.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical investigations on the performance of newly synthesized azomethine polyester on rebar corrosion

Bhuvaneshwari

Arokiyaraj²,

Iyer

et al. 2014

Materials & Corrosion

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Novel azomethine-based polyester is synthesized and the structure of the products is confirmed by 1 H NMR, FT-IR, and XRD. The as synthesized polymer is employed as inhibitor against the corrosion of rebar in artificially simulated concrete pore solution with chloride contamination (blank) by means of Tafel polarization and electrochemical impedance measurements. First time in literature, azomethine polyester is employed as inhibitor for rebar corrosion. Polarization studies exhibited the maximum inhibition efficiency of 98% at 1000 ppm concentration. Electrochemical studies revealed the mixed-type nature of the inhibitors. The adsorption behavior of as synthesized polymeric inhibitor obeys Langmuir adsorption model. Mechanisms reveal the entire molecule is expected to adsorb on to the metal surface with near flat orientation and tend to arrange themselves parallel to each other covering the entire metal surface, hence, preventing the ingress of aggressive species to the metal surface. Further, SEM and atomic force microscope have proven the presence of adsorptive layer on the rebar under the simulated atmosphere.

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Section: Introductionmentioning

confidence: 99%

Electrochemical investigations on the performance of newly synthesized azomethine polyester on rebar corrosion

Bhuvaneshwari

Arokiyaraj²,

Iyer

et al. 2014

Materials & Corrosion

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“…Poly(azomethine amide)s reported so far mainly focussed to improve the polymer solubility, thermal stability and liquid crystalline properties [4][5][6][7][8]. Inclusion of phenylthiourea groups into polymer backbone has gained great importance for its excellent properties such as corrosion resistance, thermal stability, semi conductivity and binding to metal ions [9][10][11]. Polythioamides are well known in which the amide carbonyl oxygen is replaced with sulfur [12].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Metal Ion Adsorption Studies on Novel Aromatic Poly(Azomethine Amide)s Containing Thiourea Groups

Ravikumar¹,

Kalaivani²,

Vidhyadevi³

et al. 2014

OJPChem

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A series of novel ladder-type poly(azomethine amide)s (PAMs) were prepared from new azomethine containing carboxylic acid monomer (TCA) with simple aromatic diamines and aromatic diamines with thiourea groups (TDAs) by means of phosphorylation polycondensation reaction. Molecular weights of the polyamides were evaluated viscometrically, and the inherent viscosities were in the range of 0.31 -0.58 g/dl. These ladder-type polymers were not freely soluble in common organic solvents. Structure of monomers and polymers were confirmed using FT-IR, 1 H-NMR and 13 C-NMR spectroscopic analysis. Removal of Cu 2+ and Cd 2+ from aqueous solutions by adsorption onto the polyamides was investigated. The effect of pH, initial metal ion concentrations and contact time were studied in batch experiments. The polyamides were found to be highly effective adsorbents for the removal of Cu 2+ and Cd 2+ metal ions from aqueous solutions. In a mixture of metal ions, the selectivity order was found to be Pb(II) > Cu(II) > Cr(IV) > Cd(II).

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“…In this process, the strong π-π interaction of 6π aromatic heterocycle TAZ molecules with unfilled dπ orbitals of Al atoms/ions plays a key role in the formation of a dense, orderly and stable passivation film. 22,[44][45][46][47] Therefore, compared with A, B and C, D in Fig. 2, the increase in TAZ concentration leads to gradually decrease in both the SER and polishing rate.…”

Section: Slurrymentioning

confidence: 87%

“…3. 22,42,44,45 When the TAZ molecules reach saturation adsorption on the Al surface, as to achieve the optimized structure, it will also carry out the rearrangement process. In this process, the strong π-π interaction of 6π aromatic heterocycle TAZ molecules with unfilled dπ orbitals of Al atoms/ions plays a key role in the formation of a dense, orderly and stable passivation film.…”

Section: Slurrymentioning

confidence: 99%

Synergetic Effect of 1,2,4-triazole and Glycine on Chemical Mechanical Planarization of Aluminum at Low Polishing Pressure in an Eco-Friendly Slurry

Sun

Wang

Liu

et al. 2020

ECS J. Solid State Sci. Technol.

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In this paper, glycine and 1,2,4-triazole (TAZ) are used as eco-friendly additives to compensate the decrease in removal rate owing to the low polishing pressure in chemical mechanical planarization (CMP) of aluminum (Al) at near-neutral pH value. It demonstrated that the synergetic effect of glycine and TAZ participates in the formation of a weak passive layer with the hardness of 0.419 GPa on Al surface, which is compact enough to protect the Al surface from chemical dissolution and meanwhile relatively weak enough to achieve high polishing rate. Even at a low polishing pressure of 1.0 psi, a material removal rate of 750 nm min−1 with surface roughness of 0.19 nm was obtained in an eco-friendly slurry at pH 7.5. It was found that the weak passive layer is physicochemical formed on surface of Al with Al-TAZ bonds, which is subsequently complexed by glycine with Al-COOH bonds verified by Langmuir isotherm theory and X-ray photoelectron spectroscopy test. The above two synergistic parts are integrated into the material removal process. The material planarization mechanism in CMP process of Al was discussed as well.

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Corrosion control of phenylthiourea polymers on aluminium in alkaline medium

Cited by 12 publications

References 17 publications

Electrochemical investigations on the performance of newly synthesized azomethine polyester on rebar corrosion

Electrochemical investigations on the performance of newly synthesized azomethine polyester on rebar corrosion

Synthesis, Characterization and Metal Ion Adsorption Studies on Novel Aromatic Poly(Azomethine Amide)s Containing Thiourea Groups

Synergetic Effect of 1,2,4-triazole and Glycine on Chemical Mechanical Planarization of Aluminum at Low Polishing Pressure in an Eco-Friendly Slurry

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