Extending surface Raman spectroscopy to transition metals for practical applications IV. A study on corrosion inhibition of benzotriazole on bare Fe electrodes

Yao, Jianlin; Ren, Bin; Huang, Zhi‐Zhong; Cao, Peigen; Gu, Ruiting; Zhang, Tian

doi:10.1016/s0013-4686(02)00834-4

Cited by 114 publications

(74 citation statements)

References 30 publications

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“…41 Specifically, the chemical adsorption can occur between the π-electrons of the BTA molecules and the vacant d-orbital of the iron atoms on the surface, and the nitrogen atoms of the triazole ring of BTA can directly react with the iron atoms to generate complex polymer as a form of [Fe n (BTA) p ] m . 40 Therefore, it can be inferred that, with the addition of H 2 O 2 , BTA can form a thin passivating layer on the top surface of 316L stainless steel, and as a result, the MRR is gradually suppressed. Two-step polishing method.-In order to realize satisfactory surface quality of 316L stainless steel with economical resources like slurry and polishing time, based on the above investigation, a twostep polishing method is proposed as follows: the 1st step is designed to quickly remove the mechanically damaged layer caused by the previous machining process with a large MRR of about 3000 Å/min, and meanwhile to achieve moderate surface quality of about 3 nm R a ; the 2nd step is designed to further improve the surface quality by using a Figure 13.…”

Section: Resultsmentioning

confidence: 99%

Chemical Mechanical Polishing of Stainless Steel as Solar Cell Substrate

Jiang

Yang

2015

ECS J. Solid State Sci. Technol.

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Recently, stainless steel has been widely used as the solar cell substrate. In this paper, chemical mechanical polishing technique was employed to prepare the ultra-smooth 316L stainless steel surface for such application. The effects of solid content, pH, H 2 O 2 and benzotriazole (BTA) on the polishing performance of 316L stainless steel were investigated. The results indicated that, at pH 4.00, with the increase in the H 2 O 2 concentration, the MRR first dramatically increases due to the fact that, with the addition of small amount of H 2 O 2 , a porous outer layer mainly consisting of iron-enriched oxides with relatively low mechanical strength of the bilayer-structure oxide film is rapidly formed on the surface. After reaching the maximum value, the MRR gradually decreases since the outer layer gradually grows compact by the transformation of γ-FeOOH into α-FeOOH and even into α-Fe 2 O 3 . With the addition of BTA, the MRR can be suppressed, which is probably attributed to the formation of BTA passivating film on the top surface. Finally, a two-step polishing method was proposed, by which the ultra-smooth 316L stainless steel surface with the surface roughness R a about 2.0 nm can be achieved within 30 min and it can be subsequently used for thin-film solar cells. Stainless steel plays an important role in the mechanical industry due to the excellent mechanical properties, the high thermostability and the strong corrosion resistance. Recently, various types of stainless steels have been intensively used in precise devices, 1-4 especially been used as the substrate for thin-film solar cells. [5][6][7][8][9][10] In order to achieve satisfactory performance of solar cells, low roughness, low defects as well as excellent flatness of the stainless steel substrate are intensively demanded and even indispensable. It is reported that, by improving the surface roughness of stainless steel substrate from 38 nm to 23 nm, the conversion efficiency of hydrogenated amorphous silicon thin-film solar cells can greatly increase to 5.4%. 10 As is revealed, chemical mechanical polishing (CMP) combines the synergetic effects of chemical corrosion and mechanical abrasion, and can achieve both local and global planarization of the substrate surface. 11-14Hu et al.2 used colloidal silica as the abrasive and investigated the effects of pH and oxidizer on the polishing performance of stainless steel, and it was reported that the combination of oxidizer and strong acidity was the prerequisite for high material removal rate (MRR). However, the microscopic defects of 1-2 μm in size cannot be effectively avoided on the polished surface. Lee et al.10 used electrochemical mechanical polishing technique, which applied an additional anodic potential on the stainless steel substrate besides CMP, to polish the stainless steel surface, and it was reported that the polished surface roughness was reduced from about 38 nm to about 23 nm. However, more detailed polishing performance and the mechanism of chemical reactions during the polishing pr...

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Section: Resultsmentioning

confidence: 99%

Chemical Mechanical Polishing of Stainless Steel as Solar Cell Substrate

Jiang

Yang

2015

ECS J. Solid State Sci. Technol.

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“…Moreover, the involved organic molecules or inorganic ions can exhibit different inhibition efficiencies. [40,41] For example, the introduction of I -ions into solutions containing BTAH makes the inhibition efficiency for both the anodic and cathodic processes become even more remarkable, [42,43] which thus indicates the existence of a synergetic effect between the I -ions and benzotriazole on the inhibition. However, some organic ligands might play a negative role in the inhibition when it coexists with BTAH.…”

Section: Introductionmentioning

confidence: 99%

Combined Studies on the Surface Coordination Chemistry of Benzotriazole at the Copper Electrode by Direct Electrochemical Synthesis and Surface‐Enhanced Raman Spectroscopy

Yuan¹,

Wei²,

Qin³

et al. 2007

Eur J Inorg Chem

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The surface coordination chemistry of benzotriazole (BTAH) on a Cu electrode was investigated by electrochemical synthesis of surface complexes and in situ electrochemical surface-enhanced Raman spectroscopy (SERS) in nonaqueous solution. Two different surface complexes were prepared in solution with or without triphenylphosphane (PPh 3 ). A new mixed-valence Cu-N cluster compound containing BTAH was synthesized by direct electrochemical oxidation of Cu in nonaqueous solutions with

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“…On the other hand, in hydrochloric acid solution, these additives are more effective and inhibit both the cathodic and the anodic reactions. Such behavior can be justified by physisorption of positively charged protonated BTAH + cations directly on iron surface in sulphuric acid solution and by stronger physisorption of the same cations on negatively charged pre-adsorbed chlorides in hydrochloric acid solution [38]. This hypothesis is sustained by the detection of a desorption potential (E BR ) more or less independent from the homologue type.…”

Section: Discussionmentioning

confidence: 99%

Alkyl-benzotriazole derivatives as inhibitors of iron and copper corrosion

Trabanelli¹,

Frignani

Monticelli³

et al. 2015

Int. J. Corros. Scale Inhib.

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5-Alkyl derivatives of benzotriazole (1-12 carbon atom long alkyl chain) were tested as inhibitors of pure iron corrosion in sulphuric or hydrochloric acid at 25°C and pure copper corrosion in acidic sulphate and saline solutions at 30°C. This series of compounds was more efficient in contrasting copper than iron corrosion and, generally, the longer the alkyl chain the higher the inhibiting performances and the longer the persistency of the inhibiting action. However, due to a decrease in the solubility, the maximum inhibiting effects were produced by the hexyl derivative. In the case of iron, these compounds were more efficient in the hydrochloric acid solution than in the sulphuric one, while for copper they were more effective in the acidic sulphate solution than in the acidic chloride solution. The higher inhibiting effects for copper can be justified by the mode of BTA adsorption, that consists in chemisorption, instead of physisorption occurring on iron.

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Extending surface Raman spectroscopy to transition metals for practical applications IV. A study on corrosion inhibition of benzotriazole on bare Fe electrodes

Cited by 114 publications

References 30 publications

Chemical Mechanical Polishing of Stainless Steel as Solar Cell Substrate

Chemical Mechanical Polishing of Stainless Steel as Solar Cell Substrate

Combined Studies on the Surface Coordination Chemistry of Benzotriazole at the Copper Electrode by Direct Electrochemical Synthesis and Surface‐Enhanced Raman Spectroscopy

Alkyl-benzotriazole derivatives as inhibitors of iron and copper corrosion

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