extra factor meaning in Chinese

额外因素

In the article , it states another model of oxygen corrosion - corrosion caused by dissolving oxygen , it causes damage on the metal wall surface by oxygenation when the oxygen content in the water is much higer and it is affected by some extra factors ( such as temperature , degree of the acid and the basicity , the content of solid , the water power of scouring and so on )
本文讲述的是另一种形式的氧腐蚀溶解氧的腐蚀，即由于水中氧含量较高在一定外加条件作用下（如温度、酸碱度、固含量、水力冲刷等）而引起金属壁面的氧化破坏。