scholarly journals Pure Gold Dissolution and Stainless-Steel Corrosion in Dilute Nitric or Nitrous Acid Containing Halide Salts

2021 ◽  
Vol 67 (2) ◽  
pp. 67-78
Author(s):  
Masashi Hojo
Keyword(s):  
Stainless Steel ◽  
Nitrous Acid ◽  
Steel Corrosion ◽  
Pure Gold ◽  
Gold Dissolution ◽  
Halide Salts

Dilute nitric or nitrous acid solution containing halide ions as effective media for pure gold dissolution

2015 ◽  
Vol 17 (30) ◽  
pp. 19948-19956 ◽  
Author(s):  
Masashi Hojo ◽  
Masahiko Yamamoto ◽  
Kei Okamura
Keyword(s):  
Acid Solution ◽  
Nitrous Acid ◽  
Gold Wire ◽  
Pure Gold ◽  
Halide Ions ◽  
Gold Dissolution ◽  
Effective Media ◽  
Dissolution Rate Constant ◽  
Chloride Salts ◽  
Aqueous Nitric Acid

Bromide salts are more effective than chloride salts in gaining the ability of dissolving gold in dilute aqueous nitric acid solution. At 60 °C, a piece of gold-wire (ca. 20 mg) is dissolved in 20 mL of as low as 0.10 mol L−1 HNO3 solution containing 1.0–5.0 mol L−1 NaBr and the dissolution rate constant, log(k/s−1), increases linearly with increasing NaBr concentration.

Protective postaction of inhibitor IFKhAN-92 for chromium-nickel stainless steel corrosion in hydrochloric acid

2019 ◽  
pp. 20-25
Author(s):  
Ya.G. Avdeev ◽  
◽  
Yu.B. Makarychev ◽  
D.S. Kuznetsov ◽  
L.P. Kazanskii ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Hydrochloric Acid ◽  
Steel Corrosion

Leaching of Am-241 from a Radioactive Waste Glass Corroded in the Presence of Stainless Steel Corrosion Products and/or Bentonite

1987 ◽  
Vol 112 ◽  
Author(s):  
Masaki Tsukamoto ◽  
Inga-Kari Björner ◽  
Hilbert Christensen ◽  
Hans-Peter Hermansson ◽  
Lars Werme
Keyword(s):  
Stainless Steel ◽  
Radioactive Waste ◽  
Mass Loss ◽  
Total Mass ◽  
Corrosion Behaviour ◽  
Steel Corrosion ◽  
Waste Glass ◽  
Corrosion Products ◽  
Total Mass Loss ◽  
Elemental Mass

AbstractThe release of Am-241 during corrosion of the radioactive waste glass, JSS-A, has been studied in the presence of corrosion products and/or uncom-pacted bentonite. The corrosion behaviour of Am-241 has been analyzed using gamma spectrometry. Adsorption of Am-241 on bentonite is observed in all cases. The contents of Am-241 in centrifuged leachates are in most cases less than 1/100 of total values. The normalized elemental mass loss of Am increases initially with corrosion time, and the values in the presence of bentonite and corrosion products are larger than those in the presence of bentonite alone. This tendency is in agreement with results previously found for other elements. The release of Am is low, only about 10–20 % of the corresponding total mass loss.

scholarly journals From Waste to Valuable Resource: Lignin as a Sustainable Anti-Corrosion Coating

Coatings ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 454 ◽  
Author(s):  
Arman Dastpak ◽  
Kirsi Yliniemi ◽  
Mariana de Oliveira Monteiro ◽  
Sarah Höhn ◽  
Sannakaisa Virtanen ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Open Circuit Potential ◽  
Electrochemical Impedance ◽  
Steel Corrosion ◽  
Linear Sweep Voltammetry ◽  
Corrosion Current ◽  
Polymer Coatings ◽  
Open Circuit ◽  
Linear Sweep ◽  
Cyclic Potentiodynamic Polarization

In this study, a waste of biorefinery—lignin—is investigated as an anticorrosion coating on stainless steel. Corrosion behavior of two lignin types (hardwood beech and softwood spruce) was studied by electrochemical measurements (linear sweep voltammetry, open circuit potential, potentiostatic polarization, cyclic potentiodynamic polarization, and electrochemical impedance measurements) during exposure to simulated body fluid (SBF) or phosphate buffer (PBS). Results from linear sweep voltammetry of lignin-coated samples, in particular, demonstrated a reduction in corrosion current density between 1 and 3 orders of magnitude cf. blank stainless steel. Furthermore, results from cross cut adhesion tests on lignin-coated samples demonstrated that the best possible adhesion (grade 0) of ISO 2409 standard was achieved for the investigated novel coatings. Such findings suggest that lignin materials could transform the field of organic coatings towards more sustainable alternatives by replacing non-renewable polymer coatings.

scholarly journals Electrochemical Studies of Stainless Steel Corrosion in Peroxide Solutions

2012 ◽  
Vol 30 (2) ◽  
pp. 99-109 ◽  
Author(s):  
A K Singh ◽  
V Chaudhary ◽  
A Sharma
Keyword(s):  
Stainless Steel ◽  
Steel Corrosion ◽  
Electrochemical Studies

Research on 304,321,316Lect. Stainless Steel Corrosion under the Calcinating Gas Atmosphere of Ammonium Paramolybdate

2012 ◽  
Vol 602-604 ◽  
pp. 421-425 ◽  
Author(s):  
Chang Sen Luo ◽  
Hong Luo ◽  
Xi Yang He
Keyword(s):  
Stainless Steel ◽  
Weight Gain ◽  
Average Rate ◽  
Steel Corrosion ◽  
Corrosion Layer ◽  
Surface Phase ◽  
Phase Constituent ◽  
Gain Rate ◽  
Gas Atmosphere ◽  
Weight Gain Rate

In this paper, the corrosion behavior was researched which was happen on the 304,321,316Lect. stainless steel materials in the analogue situation of calcining gas atmosphere of ammonium paramolybdate.The oxidized etch which happened on the sample’s surface, phase constituent and element content of the fracture surface, was analyzed by the means of SEM、XRD.The results showed that the phases of Fe2(MoO4)3,MoO3,MoO2.5(OH)0.5,Cr2O3,Cr2Ti5O13, Fe2O3,Fe3O4 ect. are contained on the surfaces of the 304,316L, 321 samples which are calcined. There is an inside oxidized corrosion layer in 304 316L. The oxidizing film is damaged and the oxygen penetrates into the base to form an oxidized layer. A thin and compact oxidation film was formed between 321 corrosion layer and the alloy interface, which have prevented the base from further corrosion, under this experiment conditions, this steel belonged to the inoxidizability materials. The coating deficiency of 321 steel is shallow; the particles of oxidate is thin and without inner corrosion; the weight gain rate of oxidized etch is slow (average rate 5.2×10-2mg/ (cm2•h)), the weight gain is less and corrosion resistance is fine.

Monitoring of 13% Cr martensitic stainless steel corrosion in chloride solution in presence of thiosulphate by acoustic emission technique

2016 ◽  
Vol 111 ◽  
pp. 151-161 ◽  
Author(s):  
Luigi Calabrese ◽  
Massimiliano Galeano ◽  
Edoardo Proverbio ◽  
Domenico Di Pietro ◽  
Filippo Cappuccini ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Acoustic Emission ◽  
Chloride Solution ◽  
Martensitic Stainless Steel ◽  
Steel Corrosion ◽  
Acoustic Emission Technique

Evolution of 307 L Stainless Steel Corrosion on the Oxidative Stability of Biodiesel During Storage

2021 ◽  
Vol 7 (4) ◽  
Author(s):  
M. El Hawary ◽  
M. Khachani ◽  
G. Kaichouh ◽  
A. Guenbour ◽  
A. Zarrouk ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Oxidative Stability ◽  
Steel Corrosion
Sign in / Sign up

Export Citation Format

Share Document