Open AccessAN EVALUATION OF THE SULFURIC ACID-SODIUM NITRITE ETCH FOR ZIRCALOY-2
Author(s) -
S. Kass
Publication year - 1954
Language(s) - English
Resource type - Reports
DOI - 10.2172/4147301
Subject(s) - sulfuric acid , hydrofluoric acid , nitrite , etching (microfabrication) , nitric acid , sodium nitrite , corrosion , zirconium , inorganic chemistry , zirconium alloy , chemistry , materials science , metallurgy , composite material , organic chemistry , nitrate , layer (electronics)
Preliminary experiments indicate that there are no significant differences in the corrosion rates of zirconium or Zircaloy-2 after etching with the nitric--hydrofluoric solution or the sulfuric--nitrite solution, provided proper etching and washing techniques are followed. Incomplete removal of the residual etchant is deleterious to the corrosion resistance; however, this effect in the case of the sulfuric--nitrite solution is not as pronounced as in the case of the nitric--hydrofluoric acid solution. The anticipated advantages in the new etch were not completely realized. Additional development aimed at modifying the sulfuric--nitrite etch would have to be performed in order to overcome the disadvantages before recommendation for the adoption of the etch could be made. (auth