Etching on Aluminum, stainless steel and Titanium in preparation for Dye penetrant inspection (DPI), also called liquid penetrant inspection (LPI) per NASA JSC/PRC-6506 or ASTM E1417
	Calibrated equipment for precise measurement of metal removal
	Certificates of compliance provided at customer request
	Custom masking and polishing also available
	Quality Control Manual available upon request

Because surface impurities produced by mechanical finishing may smear some components of the steel, these can “hide” the surface defects intended to be revealed by the DPI or LPI. Etching will remove these metallic impurities so the dye can reveal any surface defects.