Corrosion behaviour of stainless steel, nickel base alloy and titanium weldments in chlorination and chlorine dioxide bleaching

This publication presents an overview of a decade-long series of programs which exposed welded coupon and full diameter pipe in chlorination and chlorine dioxide bleaching equipment. Findings have guided procedures for the fabrication and post fabrication clean-up of over 75 6% Mo stainless steel washers. Findings are also applicable to 6% Mo, nickel base alloy, clad nickel base alloy, titanium and plastic-lined piping for bleach plants. Guidelines for procurement and fabrication of piping materials are included. Applicability to mixer-to-tower, tower-to-vat and filtrate piping sections is reported.