The variety of miniature dc micro motor deceleration motor has many, today is the rust of the problem, mainly for the gearbox of dc motor and a variety of miniature dc motor slowdown. Friends knew have often use this motor, motor used for a long time, gear box looks more or less will rust, in general, it is a device in the interior of the product, if not usually open it ok, if installed in the outside, we will talk about the topic of rust, meet again don't know how to solve this problem, we can provide some methods: 1, when washing the miniature dc motor slowdown gear box must be washed clean. 2, appearance is best with oxalic acid, using concentration of 1 ~ 2. 3, choose sulfuric acid can be pickling, pickling time cannot too long, the best is to choose phosphate. 4, best after pickling with sodium carbonate and 1 ~ 2. 5, zinc series phosphating treatment of acidity to the ceiling, dipping treatment concentration: TA: more than 35. 费尔南多-阿隆索:1。 2交流:8 (20 cc fermentation tube)。 6, skim must choose weak alkaline degreasing, not contain alkaloid, TAL to control at about 15 point, PH can't more than 13. On guard against the micro dc gear motor gearbox rusty common sense, we grasp the future, to learn more about the micro again some related problems of dc gear motor, gear motor in tiny common problems, we can discover and learn more knowledge.