A Practical Way to Prevent Embrittlement Cracking

Abstract

Suggestions are given for applying methods of preventing embrittlement cracking which are based upon the results of a great number of tests with the embrittlement detector on operating boilers. A summary is given in tabular form of more than 900 plant tests of this nature on variously treated boiler waters. The method of water treatment, the sources of supply of chemicals, and the most desirable conditions of application for sodium nitrate, quebracho extract, waste sulphite liquor, and zero-caustic alkalinity are discussed. These methods of chemical treatment for preventing embrittlement are compared.