Investigation on Electronic Property of Passive Film on Nickel in Bicarbonate/Carbonate Buffer Solution

2011 ◽  
Vol 29 (2) ◽  
pp. 243-253 ◽  
Author(s):  
Dangguo Li ◽  
Jiadao Wang ◽  
Haosheng Chen ◽  
Darong Chen
Keyword(s):  
Passive Film ◽  
Electronic Property ◽  
Buffer Solution ◽  
Carbonate Buffer

TEMPO-mediated oxidation of cellulose in carbonate buffer solution

2015 ◽  
Vol 16 (2) ◽  
pp. 319-325 ◽  
Author(s):  
Lei Dai ◽  
Zhu Long ◽  
Yong Lv ◽  
Dan Zhang ◽  
Hai-bo Deng ◽  
...  
Keyword(s):  
Buffer Solution ◽  
Carbonate Buffer ◽  
Mediated Oxidation

Photoelectrochemical analysis on the passive film formed on Fe–20Cr in pH 8.5 buffer solution

2002 ◽  
Vol 47 (10) ◽  
pp. 1661-1668 ◽  
Author(s):  
EunAe Cho ◽  
HyukSang Kwon ◽  
Digby D. Macdonald
Keyword(s):  
Passive Film ◽  
Buffer Solution

(Invited) Micro- and Nano-Structure of Passive Film Formed on High Strengthen Steel Surface in pH 6.5 Boric Acid-Borate Buffer Solution

2020 ◽  
Vol MA2020-02 (12) ◽  
pp. 1263-1263
Author(s):  
Koji Fushimi ◽  
Kanta Higa ◽  
Yuichi Kitagawa ◽  
Yasuchika Hasegawa ◽  
Hideki Katayama
Keyword(s):  
Boric Acid ◽  
Passive Film ◽  
Steel Surface ◽  
Borate Buffer ◽  
Borate Buffer Solution ◽  
Buffer Solution ◽  
Nano Structure

scholarly journals Study of Complexes of Tannic Acid with Fe(III) and Fe(II)

2019 ◽  
Vol 2019 ◽  
pp. 1-6 ◽  
Author(s):  
Zhaofeng Fu ◽  
Rui Chen
Keyword(s):  
Tannic Acid ◽  
Ph Value ◽  
Ratio Method ◽  
Iron Ions ◽  
Test Paper ◽  
Buffer Solution ◽  
Carbonate Buffer ◽  
Color Changes ◽  
Different Color ◽  
Complex Ratio

UV-Vis absorption spectra of tannic acid were gained at pH 1.0∼9.0. Due to the pH value dependence of complex, the stoichiometry of tannic acid with iron ions was tested in buffer solution by the mole ratio method. The result suggests that the complex ratio of tannic acid to Fe(III) is 1 : 1 and to Fe(II) 3 : 1 in the carbonate buffer solution, and the complex ratio of iron-tannic complexes is 1 : 1 at pH 2.2. Due to the different color changes of tannic acid with iron ions in the coordination reactions, a tannic acid test paper was designed. The concentrations of Fe(III) more than 5.000 × 10−6 mol/L and the concentrations of Fe(II) more than 1.000 × 10−5 mol/L in aqueous solution can be detected by this test paper.

Effect of Cold Rolling on Passive Film on Pure Iron in pH 8.4 Borate Buffer Solution

2019 ◽  
Vol 25 (40) ◽  
pp. 3-15 ◽  
Author(s):  
Takatoshi Yamamoto ◽  
Koji Fushimi ◽  
Seiji Miura ◽  
Hidetaka Konno
Keyword(s):  
Cold Rolling ◽  
Passive Film ◽  
Pure Iron ◽  
Borate Buffer ◽  
Borate Buffer Solution ◽  
Buffer Solution

Electrochemical Studies on the Passivation Behavior of Cu-Ni-Fe Alloy in Borate Buffer Solution at pH 8.4

2011 ◽  
Vol 399-401 ◽  
pp. 2067-2071
Author(s):  
Qiong Yu Zhou ◽  
Yi Wang ◽  
Qing Dong Zhong
Keyword(s):  
Passive Film ◽  
Heating Temperature ◽  
Alloy Layer ◽  
Hydrogen Gas ◽  
Borate Buffer ◽  
Borate Buffer Solution ◽  
Buffer Solution ◽  
Mixed Powder ◽  
Gas Atmosphere ◽  
Semiconductor Properties

Cu-Ni-Fe alloy-layer was prepared by the method of copper oxide- nickel oxide mixed powder deposited on the surface of mild steel samples and then treated under high temperature and hydrogen gas atmosphere. Polarization techniques and Mott-Schottky analysis in conjunction with the point defect model (PDM) have been used to investigate the semiconductor properties of the passive films formed on the surface of Cu-Ni-Fe alloy layer in borate buffer solution at pH 8.4. The results showed that the passive film formed on the surface was more compact, highly protective with higher heating temperature. Carriers density and vacancies diffusion coefficient of the passive film formed on Cu-Ni-Fe alloys decreased with higher heating temperature. The vacancies diffusivity is about magnitude of 10-20m2•s-1 in borate buffer solution at pH 8.4.

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