Accession Number : AD0692045

Title :   CERTAIN ORGANIC CORROSION INHIBITORS FOR TITANIUM IN SULFURIC ACID. II,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Brynza,A. P. ; Sotnikova,V. I. ; Ponomarenko,T. A.

Report Date : 31 JAN 1969

Pagination or Media Count : 8

Abstract : The corrosive and electrochemical behavior of titanium was studied in 5 N sulfuric acid solutions with admixtures of para-, meta- and orthonitrobenzoic acids. It is shown that these admixtures, like other nitro derivatives, inhibit the corrosion of titanium; a characteristic feature of the action of these inhibitors, once a certain concentration is reached, is their ability to provide complete corrosion protection to titanium by shifting its steady-state potential to the passivation range. It is shown that these inhibitors sharply inhibit the anodic process, decreasing the passivation current severalfold, and facilitate the cathodic process as a result of their own electroreduction. The dependence of the cathodic polarization on the inhibitor concentration and rate of stirring of the solution was studied. The inhibition of the cathodic process upon transition to the range of hydrogen polarization is due to obstacles of a diffusional order. (Author)

Descriptors :   (*TITANIUM, *CORROSION INHIBITION), (*ELECTROCHEMISTRY, TITANIUM), SULFURIC ACID, NITROBENZENES, BENZOIC ACIDS, USSR

Subject Categories : Physical Chemistry
      Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE