Active brazing flux, metal oxide film removing method and tin-coating method

The invention provides an active brazing flux, a metal oxide film removing method and a tin-coating method. The metal oxide film removing method comprises the following steps of step 1, getting and weighing raw materials for preparing the active brazing flux, and preparing the active brazing flux: a...

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Main Authors GAO ZHUQING, WANG ZHIDONG, HONG YUAN, GAO FENGLIN, KONG ZHAOCAI, ZHU PINGPING, ZOU HEFEI, DU YANFENG, MA LICUI, YANG HAIXIN
Format Patent
LanguageChinese
English
Published 17.11.2020
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Summary:The invention provides an active brazing flux, a metal oxide film removing method and a tin-coating method. The metal oxide film removing method comprises the following steps of step 1, getting and weighing raw materials for preparing the active brazing flux, and preparing the active brazing flux: adding weighed stannous chloride into concentrated hydrochloric acid, then adding zinc particles to asaturated state, and fully reacting; step 2, performing mechanical cleaning on a to-be-brazed region of a part which is difficult to be removed of the metal oxide film, after cleaning, putting the to-be-brazed region into the active brazing flux for soaking, and performing removal of the metal oxide film. According to the metal oxide film removing method provided by the invention, by researchingand developing the active brazing flux and improving the metal oxide film removing method, the oxide film on the hard-to-remove surface, such as the surface of nickel-chromium alloy, of the metal oxide film can be effectively
Bibliography:Application Number: CN202010676875