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在科研生产中往往需要分别或同时显示双金属的组织。因两种金属的物理化学性质不同,而同时显示两种金属的组织困难较大。我们用近十种腐蚀剂对显示铜-钢复合板组织进行了多次试验,最后选出两种较为满意的腐蚀剂。今介绍如下: 试剂一甲液:4～15％硝酸铁-乙醇溶液(用时新配); 乙液:2～5％硝酸-乙醇溶液。该试剂乙液只显示钢的组织;甲液则显示铜的组织,而钢铜界面的腐蚀较快。腐蚀时用分层腐蚀,可浸入或擦拭。为了使铜钢二种金属组织及界面清晰,在操作时要特别
In scientific research and production often need to show bimetallic organizations separately or simultaneously. Due to the different physicochemical properties of the two metals, it is also shown that the two metals are more difficult to organize. We used nearly ten kinds of etchants to show the copper-steel composite plate tissue for many times, and finally selected two more satisfactory etchants. This introduction is as follows: Reagents A liquid: 4 ~ 15% ferric nitrate - ethanol solution (with the new time); B liquid: 2 ~ 5% nitric acid - ethanol solution. The reagent B only shows the organization of steel; A liquid shows the organization of copper, but the corrosion of steel and copper interface faster. Corrosion with layered corrosion, immersion or wipe. In order to make the two types of copper steel and clear interface, the operation should be special