牺牲阳极材料镁合金阳极MG-22介绍

牺牲阳极材料镁合金阳极MG-22介绍

镁阳极的均匀电流输出不会受到干扰主要是因为他的阳极较化比较小，铁、同和镍杂质成分增加了阳极的局部腐蚀，这样就减少了他的寿命，镁阳极主要用在电阻率土壤P≤100Ωm的地下装置中，带状的镁阳极用在P≤150Ωm的范围内。海水里镁阳极的较大输出可以达到1A。镁阳极的阴极保护电流输出给电阻率有关系，优点是：阴极保护的铁面比较，电位差较大，缺点：表面不光滑，镁阳极不安全不能放在易爆的地方，效率jin仅约50%。国外还研制乐然埋地装置的高电流镁阳极，杂质比较低，寿命比较长。电位更低约-0.1	V。通过加入钠使合金成分得到类似效果。

The uniform current output of the magnesium anode will not be disturbed mainly because its anode polarization is relatively small, and the impurity components of iron, nickel and the like increase the local corrosion of the anode, thus reducing its life span. the magnesium anode is mainly used in underground devices with resistivity soil p ≤ 100Ω m, and the banded magnesium anode is used in the range of p ≤ 150Ω m.  The maximum output of magnesium anode in seawater can reach 1a.  The output of cathodic protection current of magnesium anode is related to the resistivity. the advantage is that compared with the iron surface of cathodic protection, the potential difference is the largest. the disadvantage is that the surface is not smooth, the magnesium anode is unsafe and cannot be placed in explosive places, and the efficiency Jin is only about 50 %.  Foreign countries have also developed high-current magnesium anodes for lelan buried devices, which have relatively low impurities and long service life.  The potential is lower by about - 0.1 v..  A similar effect can be obtained by adding sodium to the alloy composition.
 
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