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用10%的硫酸溶液浸泡的照相纸对含硫0.3%～10%的高硫铜进行硫印试验,几分钟后照相纸上仍未留下印痕。 j·P·G·Farr对试样施加负电位的铜硫印法是一种成功的技术。其方法如下: 先将铜试样研磨,清洗,脱脂。把照相纸放在2%硫酸溶液里浸泡3～4分钟,取出,去掉过多的硫酸溶液。然后把照相纸的药膜面紧贴在铜试样表面,不能出现气泡。将试样与照相纸一起放在一块金属板上(最好是铝板)。试样接直流电源的负极,金属板接直流电源的正极。通3V电压10秒钟(图1)。这样就能
Photographic paper soaked in 10% sulfuric acid solution was subjected to a sulfur print test of high sulfur copper containing 0.3% to 10% sulfur. After a few minutes, no impression was left on the photographic paper. JPG Farr The copper-sulfur stamping method of applying a negative potential to a sample is a successful technique. The method is as follows: first copper sample grinding, cleaning, degreasing. The photographic paper soaked in 2% sulfuric acid solution for 3 to 4 minutes, remove and remove excess sulfuric acid solution. Then the photographic film of drug film surface close to the copper sample surface, can not appear bubbles. Place the test specimen together with the photographic paper on a metal plate (preferably aluminum). The sample is connected to the negative pole of the DC power supply and the metal plate is connected to the positive pole of the DC power supply. 3V voltage for 10 seconds (Figure 1). This will do