| 摘要 |
<p>A surface treatment process for components composed of aluminium or aluminium alloys having the treatment steps of alkaline cleaning, rinsing, alkaline pickling, rinsing, acid pigment, rinsing, is improved by the alkaline cleaning step a) or the alkaline pickling in step c) being followed by a step (A; A1; A2) of visual examination for soft spot formation.</p> |
