right|thumb|These carabiners have an anodized aluminium surface that has been dyed; they are made in many colors.
right|thumb|These carabiners have an anodized aluminium surface that has been dyed; they are made in many colors.
Anodizing is an electrolytic passivation process used to increase the thickness of the natural oxide layer on the surface of metal parts.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).