稀土
稀土
희토
CHINESE RARE EARTHS
2010年
1期
69-72
,共4页
锌镀层%稀土转化膜%成膜机理
鋅鍍層%稀土轉化膜%成膜機理
자도층%희토전화막%성막궤리
plating%rare earth conversion coatings%mechanism of forming
将镀锌层浸泡于以Ce(NO_3)_3·6H_2O为主盐、以30% H_2O_2为氧化剂的稀土转化膜处理液中,通过计算界面上pH可达到的最大值、Ce-H_2O系电位-pH图及Zn-H_2O系电位-pH图,推断稀土转化膜可能是由ZnO、CeO_2、Ce2O_3、Ce(OH)_3及Ce(OH)_4构成;同时利用X射线光电子能谱仪对该铈盐转化膜表面进行成分分析,结果表明,铈盐转化膜主要是由ZnO、CeO_2、Ce2O_3、Ce(OH)_3、Ce(OH)_4构成的复合膜层,这与热力学分析计算相吻合.
將鍍鋅層浸泡于以Ce(NO_3)_3·6H_2O為主鹽、以30% H_2O_2為氧化劑的稀土轉化膜處理液中,通過計算界麵上pH可達到的最大值、Ce-H_2O繫電位-pH圖及Zn-H_2O繫電位-pH圖,推斷稀土轉化膜可能是由ZnO、CeO_2、Ce2O_3、Ce(OH)_3及Ce(OH)_4構成;同時利用X射線光電子能譜儀對該鈰鹽轉化膜錶麵進行成分分析,結果錶明,鈰鹽轉化膜主要是由ZnO、CeO_2、Ce2O_3、Ce(OH)_3、Ce(OH)_4構成的複閤膜層,這與熱力學分析計算相吻閤.
장도자층침포우이Ce(NO_3)_3·6H_2O위주염、이30% H_2O_2위양화제적희토전화막처리액중,통과계산계면상pH가체도적최대치、Ce-H_2O계전위-pH도급Zn-H_2O계전위-pH도,추단희토전화막가능시유ZnO、CeO_2、Ce2O_3、Ce(OH)_3급Ce(OH)_4구성;동시이용X사선광전자능보의대해시염전화막표면진행성분분석,결과표명,시염전화막주요시유ZnO、CeO_2、Ce2O_3、Ce(OH)_3、Ce(OH)_4구성적복합막층,저여열역학분석계산상문합.
A cerium conversion coating was prepared on zinc plating by chemical conversion treatment of specimens in an aqueous solution of the main salt as Ce(NO_3)_3·6H_2O and the oxidant as 30% H_2O_2. The max pH of interface,Potential-pH plot of Ce-H_2O and Potential-pH plot of Zn-H_2O were calculated,the result inferred that the cerium conversion coating consisted of zinc oxide,cerium dioxide and hydrated cerium (Ⅲ and Ⅳ) oxide and the chemical composition of the cerium conversion coating was proved by XPS.
