本文测试了常用几种低合金铸铁在静海海水全浸区的腐蚀数据，分析研究了低合金铸铁在全浸区的腐蚀行为与腐蚀特征。试验证明：低合金铸铁在全浸区腐蚀特征为均匀腐蚀和溃疡腐蚀与坑蚀；除Ｃｒ－Ｓｂ－Ｐ－Ｃｕ铸铁外，所列五种铸铁材质年平均腐蚀率无本质区别，所不同的是腐蚀特征不同，另外，石、墨形状对腐蚀形式有影响。 This paper tests the corrosion data of several commonly used low alloy cast irons in Jinghai sea water immersion zone, and analyzes the corrosion behavior and corrosion characteristics of low alloy cast iron in the all immersion zone. Tests show that the corrosion characteristics of low alloy cast iron in the fully immersed zone are uniform corrosion and ulcer corrosion and pitting corrosion. Except for Cr-Sb-P-Cu cast iron, there is no essential difference in the annual average corrosion rate of the five cast iron materials listed. Corrosion characteristics are different, in addition, stone, ink shape has an impact on the form of corrosion.