The advantages of these three specific conditions can be seen when one compares surface preparation costs with surface and service conditions. For instance, a product that must perform a lifetime of service without subjecting it to impact or high vibration stresses, will hold a coating as effectively on a surface that was prepared with the brush-off method, than the one that received a white steel preparation. However, if impact and other surface forces will produce undue stresses between metal and coating, nothing less than a commercial surface preparation should be selected. In some cases, the white steel surface will be necessary.
Note: The aforesaid surface conditions can be held within understandable tolerances. They do prove economical and practical. The average sand discharge runs 20 lb. per minute with a new 5/16" nozzle, operating under 100 lb. pressure using a 30 to 50 grit sand.
In abnormally damp climates a more...
