Accession Number : AD0633897

Title :   A PRIMER FOR PROTECTING METAL WHICH HAS BEEN CLEANED AGAINST CORROSION,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Iskra,E. V. ; Sokolov,G. M.

Report Date : 1966

Pagination or Media Count : 11

Abstract : Results of the tests conducted make it possible to establish the following. When a clean steel surface is treated with a tannic acid solution a film of iron tannate forms on the surface and has passivating properties. It was established that the iron tannate films had little resistance to water, and that, under the effects of atmospheric precipitation, they were quickly destroyed. It was therefore impossible to use this passivation method on metal and structures stored in the open air. The development of the passivating compound KRT-1, the basis of which is latex and tannic acid compounds, provides the metal with protection against corrosion for from 12 to 14 months. The properties of its films were studied and the technology of using the solution in shipbuilding is suggested. It was proven that the presence of the KRT-1 film on the surface of the metal had no negative effects on subsequent painting. It was established that the KRT-1 film had no effect on the quality of welding operations and that it was not necessary to take any special measures by way of precaution when doing such work on surfaces coated with KRT-1 films. (Author)

Descriptors :   (*COATINGS, *CORROSION INHIBITION), PAINT PRIMERS, USSR, TANNIC ACID, RUBBER, RUBBER COATINGS, COMPATIBILITY, FILMS, METALS, PROTECTIVE TREATMENTS

Subject Categories : Coatings, Colorants and Finishes
      Properties of Metals and Alloys
      Fabrication Metallurgy
      Elastomers and Rubber

Distribution Statement : APPROVED FOR PUBLIC RELEASE