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 clean. Record what is known about the substrate without inventing a material grade or treatment history.
Use a restricted location when a preliminary check is appropriate. Keep the test area separate from critical edges, compare observations consistently, and reassess if the surface response is unclear. A brief written record keeps later decisions tied to what was actually observed.