Accession Number : ADD000889

Title :   Process for Inhibiting Acid Cleaned Cooling Systems.

Descriptive Note : Patent,


Personal Author(s) : Pickett,Charles F ; Rosenfeld,Myer

Report Date : 22 Nov 1960

Pagination or Media Count : 3

Abstract : This invention relates to improvements in corrosion inhibiting process for acid cleaned cooling systems. This invention is particularly applicable where corrosion inhibition beyond that obtained by the process of the above noted application is required. More particularly the invention relates to compositions of a two step inhibitor, and the process of using this so as to minimize corrosion subsequent to acid type cleaning of the cooling system. The inhibitor consists of two parts and is used in two steps. The first part broadly comprises a sodium silicate solution. The sodium silicate solution used is satisfactory for the purpose of this invention only if the ratio of the silica to sodium oxide by weight is not less than approximately 3 nor greater than approximately 4. The second part of the inhibitor used in the second step of the inhibition process consists of sodium tetraborate plus hexamethylene tetramine.

Descriptors :   *Patents, *Corrosion inhibition, Sodium silicates, Amines

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE