防腐Relating to coatings,if one of two dissimilar metals in co
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防腐
Relating to coatings,if one of two dissimilar metals in contact is to be coated,the more noble or more corrosion resistant metal should be coated.Why?
为啥更耐腐蚀的一方要被涂涂料?
Relating to coatings,if one of two dissimilar metals in contact is to be coated,the more noble or more corrosion resistant metal should be coated.Why?
为啥更耐腐蚀的一方要被涂涂料?
不纯的金属跟电解质溶液接触时,会发生原电池反应,比较活泼的金属失去电子而被氧化,这种腐蚀叫做电化学腐蚀.钢铁在潮湿的空气中所发生的腐蚀是电化学腐蚀最突出的例子.电化学腐蚀就是铁和氧形成两个电极,组成腐蚀原电池.因为铁的电极电位总比氧的电极电位低,所以铁是阳极,遭到腐蚀;
在更耐腐蚀的一方被涂涂料,就是阻止原电池反应的发生!
在更耐腐蚀的一方被涂涂料,就是阻止原电池反应的发生!
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