Pitting corrosion of lead in sodium carbonate solutions containing NO3− ions

2004 ◽  
Vol 49 (15) ◽  
pp. 2415-2424 ◽  
Author(s):  
Mohammed A Amin ◽  
Sayed S Abdel Rehim
Keyword(s):  
Sodium Carbonate ◽  
Pitting Corrosion ◽  
Carbonate Solutions

THE EVOLUTION OF CARBON DIOXIDE IN THE A.-C. ELECTROLYSIS OF SODIUM CARBONATE AND BICARBONATE SOLUTIONS, AND THE DISCHARGE POTENTIALS OF CARBONATE AND BICARBONATE IONS

1934 ◽  
Vol 11 (4) ◽  
pp. 539-546
Author(s):  
J. W. Shipley
Keyword(s):  
Carbon Dioxide ◽  
Sodium Bicarbonate ◽  
Sodium Carbonate ◽  
Current Flow ◽  
Platinum Electrodes ◽  
Sodium Salts ◽  
Bicarbonate Ions ◽  
Carbonate Solutions ◽  
Bicarbonate Solutions ◽  
Discharge Potential

The a.-c. electrolysis of sodium carbonate solutions at voltages as high as 110, even when arcing occurs on the electrodes, does not cause the evolution of carbon dioxide. In the a.-c. electrolysis of aqueous bicarbonate solutions with platinum electrodes, hydrogen, oxygen and carbon dioxide are evolved freely until all the bicarbonate has been transformed to carbonate, after which the evolution of carbon dioxide ceases and only hydrogen and oxygen are given off. In a.-c. electrolysis of sodium bicarbonate solutions and solutions of the sodium salts of aliphatic acids, a deposit of finely divided platinum is formed on the electrodes. This deposit inhibits the evolution of carbon dioxide, hydrogen and oxygen, but does not affect the current flow. The decomposition potential of bicarbonate solutions in respect to the evolution of carbon dioxide on smooth platinum and with d.c. was found to be 2.2 volts, and of carbonate solutions, 3.5 volts. The anodic discharge potential of HCO3− is − 1.45 to − 1.50 volts, and of CO3−−, − 1.90 to − 1.95 volts. The evolution of carbon dioxide does not appear to cause any polarizing effect on the anode.

Washing procedures using water or sodium carbonate solutions for the decontamination of three cereals contaminated with deoxynivalenol and zearalenone

1992 ◽  
Vol 40 (11) ◽  
pp. 2147-2151 ◽  
Author(s):  
H. Locksley. Trenholm ◽  
Lynne L. Charmley ◽  
Dan B. Prelusky ◽  
Robert M. Warner
Keyword(s):  
Sodium Carbonate ◽  
Carbonate Solutions
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