1. The initial cleaning process is used for removing grease, oil, or any other contaminants using the appropriate solvents.

Cleaning or pickling aluminum alloys:

• Alkaline clean to remove oil, ink, grease and other contaminants

• Alkaline etch (pickling) to remove surface oxides and surface metal required for penetrant inspection

• Deoxidizing removes surface oxides and contaminants by removing minimal surface metal

• Titanium pickling is used to remove surface oxides and minimal surface metal prior to penetrant inspection

• While titanium possesses excellent corrosion resistant properties, some component applications require passivation and finishing

• Stainless steel or corrosion resistant steels are defined as steel alloys with a minimum of 11% chromium content by weight. This chromium oxide content gives the steel its stainless nature by forming a thin, adherent, and passive (non-reactive) film to prevent surface corrosion. This is a stark contrast to plain carbon steels. The Cres Passivation process is a cleaning process for stainless steel