Question

explain the need of washing and drying of metallographic samples before proceeding from one grinding or polishing operation to the next

Answer 1

The surface of specimen is first made with an abrasive belt or grabbing it rotary disc machine.

It is advisable during the rough grinding operation to reveal with sharp edges of coarse scratches.

Moreover, this has been replaced by a series and new finer ones and metallographic sample that are initially ground on a wet/dry.