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測氫儀的塗膜方法

发布时间：2017-04-01 点击次数：1776次

一、電解池塗液

先用外徑約5mm的軟毛刷和洗滌劑清洗電解池內壁，然後依次用自來水、蒸餾水沖洗，最後用丙酮或無水乙醇清洗並用熱風吹幹。

此時，電解池兩鉑電極間電阻應爲無窮大。

將電解池前端向上豎起，從前端滴入塗液。塗液沿池內壁流下，當塗液流到池體1/3處時，立即倒轉電解池，使多余的塗液流出，並用濾紙拭淨池口。邊轉動電解池，邊用冷風吹至無丙酮氣味。以同樣方法塗液3次，但第2次使塗液流到池體的2/3處時，倒出多余塗液；第3次使塗液流到距池體尾端約10mm處時，倒出多余的塗液。

二、五氧化二磷膜的生成

接通氧氣，調節氧氣流量約爲80ml/min。用矽橡膠管將塗液後的電解池與燃燒管細徑端口對口連接。裝好電解池冷卻水套，通入冷卻水，將電解池兩電極與電解電源引線相接。選擇10V電壓，啓動點解，每隔3min改變電解電源極性1次，直至電解終點。選擇24V电压，启动电解，直至电解终点；改變電解電源極性，启动电解，至电解终点。如此重复4次--5次，五氧化二磷膜形成完毕；或按涂膜键自动涂膜（鶴壁市華通分析儀器有限公司生产的KZCH-8型快速自動測氫儀具有自動塗膜功能，只需輕輕一按，儀器自動塗膜，快捷簡單。該儀器操作簡便，測定迅速，結果准確。可供煤炭、化工、冶金、電力和地質勘探等部門的試驗室使用。）。

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