Electrochemical behavior of some copper alloys in sulfuric acid solutions

2009 ◽  
Vol 61 (7) ◽  
pp. 599-610 ◽  
Author(s):  
H. E. El-Feky ◽  
N. H. Helal ◽  
M. R. Negem
Keyword(s):  
Sulfuric Acid ◽  
Electrochemical Behavior ◽  
Copper Alloys ◽  
Acid Solutions ◽  
Sulfuric Acid Solutions

Corrosion Resistance of Titanium Alloys Compared With Commercially Pure Titanium

CORROSION ◽  
1958 ◽  
Vol 14 (9) ◽  
pp. 25-28 ◽  
Author(s):  
DAVID SCHLAIN ◽  
CHARLES B. KENAHAN
Keyword(s):  
Sulfuric Acid ◽  
Titanium Alloys ◽  
Galvanic Corrosion ◽  
Tap Water ◽  
Copper Alloys ◽  
Pure Titanium ◽  
Acid Solutions ◽  
Commercially Pure Titanium ◽  
Commercially Pure ◽  
Sulfuric Acid Solutions

Abstract Titanium-8 percent manganese, titanium-5 percent aluminum-2½ percent tin, titanium-2 percent aluminum, titanium-6 percent aluminum, titanium-1 percent copper, and titanium-5 percent copper alloys are similar to commercially pure titanium in chemical and galvanic corrosion properties. These alloys are completely resistant to corrosion in synthetic ocean water, tap water, 1 percent sodium hydroxide, and 5 percent ferric chloride solutions. In sulfuric acid solutions saturated with air, the titanium alloys with the exception of those containing copper are resistant to corrosion in 5 percent solution at 35 C but corrode rapidly in 10 percent solution. At 60 C, these alloys are inert in 1 percent and corrode in 5 percent acid. The titanium-copper alloys usually are more resistant than commercially pure titanium to corrosion in sulfuric acid solutions and less resistant in hydrochloric acid. In contact with aluminum in 0.5 percent sulfuric acid saturated with air, titanium and the titanium-base alloys are the cathodic members of the couples. Titanium and titanium-base alloys are generally anodic when in contact with stainless steels in air-saturated 4.7, 9.3 and 17.5 percent sulfuric acid solutions but the galvanic corrosion rates are low. Furthermore, the chemical corrosion of titanium alloys is almost eliminated as a result of contact with stainless steel. 6.3.15

scholarly journals Voltammetric investigations of anodic dissolution of natural mineral chalcopyrite

2008 ◽  
Vol 44 (1) ◽  
pp. 115-124 ◽  
Author(s):  
M. Vukovic ◽  
Z.D. Stankovic ◽  
M. Rajcic-Vujasinovic ◽  
V. Cvetkovski
Keyword(s):  
Cyclic Voltammetry ◽  
Sulfuric Acid ◽  
Kinetic Analysis ◽  
Electrochemical Behavior ◽  
Electrochemical Reactions ◽  
Acid Solutions ◽  
Ore Deposit ◽  
Natural Mineral ◽  
Sulfuric Acid Solutions ◽  
Natural Chalcopyrite

Anodic oxidation of the natural mineral chalcopyrite from the Bor ore deposit has been studied by cyclic voltammetry in pure sulfuric acid solutions. At the obtained voltammograms, the appearance of peaks at certain potential regions was identified and found to be much less pronounced than those previously reported in the literature. The voltammetric kinetic analysis confirmed that two-electron exchange electrochemical reactions occur. The explanation for this somewhat different electrochemical behavior of natural chalcopyrite compared to the concentrates widely used in studies of this mineral will also be given.

Sign in / Sign up

Export Citation Format

Share Document