Difference-effect of AD-1M alloy in HCl with salts added

被引：0
|
作者：
Grigor'ev, V.P. [1 ]
Bartenev, V.V. [1 ]
Barteneva, O.I. [1 ]
机构：
[1] Rostovskij Gosudarstvennyj Univ, Rostov, Russia
来源：
Zashchita Metallov | 1993年 / 29卷 / 03期
关键词：
Additives - Aluminum alloys - Calculations - Corrosion prevention - Electrochemical corrosion - Hydrochloric acid - Inorganic chemicals - Polarization - Salts;
D O I：
暂无
中图分类号：
TG17 [金属腐蚀与保护、金属表面处理]; TQ153 [电镀工业];
学科分类号：
080503 ;
摘要：
The possibility is studied for controlling the negative difference-effect (NDA) of anodically polarized Al by contact deposition of metals. An investigation is performed into the effect of PbCl2, SnCl2, CdCl2 and IlNO3 on the NDE for AD-1M alloy in 1MHCl. It is shown that the efficiency of the NDE suppression depends on the nature of a salt added and on the polarization potential of an electrode under conditions studied, CdCl2 is the most effective addition for suppressing self-dissolution of the alloy. In the process of self-dissolution in the presence of salts as well as under corrosion the basic cathode reaction is the hydroxonium discharge. Possible decrease in the NDE and the feasibility of a positive NDE in solutions under study are analyzed. This will serve to reduce the Al alloy losses.
引用
收藏
页码：398 / 404
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