ABSTRACT

The treating procedure generally consists of vapor degreasing followed by immersion at RT in a 25% concentration (1:3 water dilution of Deoxidine) for 10-15 min. When RT-treating conditions are employed, it can represent a considerable economy as compared with heating in elaborate and expensively controlled temperature baths as required for FPL deoxidation, as reported in ASTM D-2651. At RT, as short a treatment as 5-10 min can often suffice, depending on the amount of soiling present and its adherence to the surface. If the solution temperature is raised (and consequently, the chemical etching rate advanced), the contact time to achieve deoxidation can be as short as 1-2 min.