Problem:
Prevent galling at the joints and in the drive shaft of the titanium core sample drill tubes. Also prevent contamination of moon surface samples by titanium particles or other foreign materials.

Solution:
A CANADIZE coating on both the inside and outside of the entire tube eliminated any danger of galling or contamination. All surfaces were made abrasion-resistant and permanently dry-lubricated.

Canadize is a superior alternative to titanium anodizing (anodize).