當含有濕氣的空氣和水(shui)分侵(qin)入電阻器(qi)涂層的內側(ce)后，如(ru)果在這樣的狀(zhuang)態下繼續使用電阻器(qi)，陽極側(ce)代替氧氣的生(sheng)成，但電阻體會轉(zhuan)變(bian)成離子(zi)溶出。電阻體最終(zhong)會消失，從(cong)而發生(sheng)斷(duan)線。這一過程看上去就像是電阻體逐漸(jian)被電侵(qin)蝕(shi)，所以叫電蝕(shi)，電蝕(shi)引發的斷(duan)線叫作(zuo)電蝕(shi)斷(duan)線。

電(dian)(dian)(dian)(dian)(dian)阻(zu)值越高，電(dian)(dian)(dian)(dian)(dian)蝕斷線越容(rong)易發(fa)生。這(zhe)是(shi)因為電(dian)(dian)(dian)(dian)(dian)阻(zu)值高的(de)電(dian)(dian)(dian)(dian)(dian)阻(zu)體皮膜(mo)薄(bo)，而且由細線圖(tu)案(an)構成(cheng)(cheng)，電(dian)(dian)(dian)(dian)(dian)阻(zu)體很快便會溶解。電(dian)(dian)(dian)(dian)(dian)蝕主要(yao)發(fa)生于碳膜(mo)、金屬膜(mo)。為了防(fang)止電(dian)(dian)(dian)(dian)(dian)蝕，可(ke)以采用在焊(han)接后充分清洗電(dian)(dian)(dian)(dian)(dian)阻(zu)器去(qu)除電(dian)(dian)(dian)(dian)(dian)解質成(cheng)(cheng)分、對電(dian)(dian)(dian)(dian)(dian)阻(zu)器進(jin)行(xing)防(fang)濕(shi)密封等(deng)方法。如果其(qi)他(ta)特性滿足要(yao)求，替換(huan)成(cheng)(cheng)金屬釉膜(mo)等(deng)電(dian)(dian)(dian)(dian)(dian)阻(zu)體不易離子(zi)化的(de)電(dian)(dian)(dian)(dian)(dian)阻(zu)器也是(shi)可(ke)行(xing)的(de)辦法。

文章源自：電阻器，旺詮合金電阻、旺詮(quan)合金電(dian)阻代理商