试验表明：活性硫改善了齿轮油的极压性，对抑制铜腐蚀性、防锈性能和抗氧化性能均有不利的影响。
It is concluded that active sulfur compounds may improve the oil's EP property but harm inhibition of copper corrosion, antirust property and anti-oxidation stability.
当进行防腐蚀保护时，必须保证其工作不受外部不利条件的影响。
When corrosion protection is being applied it must be ensured that the work is not affected by external adverse influences.
增大方铅矿与铁介质间的机械力，二者之间的腐蚀电偶作用和体系的还原性增强，同样不利于方铅矿浮选。
With the increase of mechanical pressure, the corrosion couple action between galena and iron is stronger, which is deleterious to galena flotation.
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