Related Aluminum Compatibility Testing Guide compatibility testing should be planned as a clearly defined check rather than a broad assumption about the whole part. Identify the exact area, note coatings or mixed materials, and keep the surrounding surface easy to inspect. Record what is known about the substrate without inventing a material grade or treatment history.
Use a representative location when a preliminary check is appropriate. Keep the test area separate from critical edges, compare observations carefully, and reassess if the surface response is unclear. A simple observation note keeps later decisions tied to what was actually observed.