Passivation & Inhibition

钝化与缓蚀机理

type:glossary · level:intermediate · material:copper · scale:decorative-object · equipment:hand-tools · stage:sealing

标签：术语,钝化,缓蚀,氧化膜,吸附膜

钝化是金属表面生成致密氧化膜（如铬酸处理）降低活性；缓蚀是缓蚀剂分子吸附成膜阻断电化学腐蚀。铜常用 BTA 缓蚀而非强钝化，以免破坏原有色泽。

Passivation grows a dense oxide film (e.g., chromate) to lower reactivity; inhibition coats the surface with adsorbed molecules that block electrochemical corrosion. Copper usually relies on BTA inhibition rather than strong passivation to preserve its color. ---