论文部分内容阅读
我校化工车间硝酸鋇生产中,母液浓缩设备腐蚀严重,进行了防腐蚀研究试验。试验的经过主要是根据金属电化学防腐原理,使被保护金属在腐蚀过程的原电池作用中,阴极化或使其处于阴极地位而得到保护。方法之一,外加比被保护金属在该介质中更易腐蚀的金属为阳极,在腐蚀介质中用导线与被保护金属接通后,由于该阳极金属的不断被腐蚀,使被保护金属电子密度增高而被阴极化,即所谓护屏保护,试验中曾用锌金属为护屏保护铅,结果失败。使铅得到保护时,锌溶解过够,锌的较多溶解影响了产品的质量。
In the production of barium nitrate in the chemical workshop of our university, the mother liquor concentration equipment is seriously corroded and a corrosion protection test is conducted. The test is mainly based on the principle of metal electrochemical corrosion, so that the role of protected metal in the process of galvanic corrosion of the original battery, the cathode or to be in the cathode position and be protected. One of the methods, plus more than the protected metal in the medium more corrosion-prone metal anode, corrosive medium with the wire and the protected metal connected, due to the continuous corrosion of the anode metal, the metal density of the protected metal increased And was the cathode, the so-called screen protection, zinc metal used in the experiment as a protective screen to protect the lead, the result failed. When lead is protected, zinc dissolves too much and more zinc dissolves and affects the quality of the product.