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通过对Ｂ１０铜镍合金（ＣＤＡ７０６）国产管材、板材长期实海暴露腐蚀规律研究，并用金相、扫描电镜（ＳＥＭ）等物理测试方法，分析观察该合金在海水中腐蚀敏感性差异的原因．结果表明，经过４年实海全浸暴露，强度较低的Ｂ１０铜管在厦门站和舟山站腐蚀速度最高，表现为冲击腐蚀和沿晶腐蚀形貌．而强度较高的Ｂ１０板材，其年均腐蚀速度表现出很大的温度敏感性．在榆林站暴露的两种材料局部腐蚀均明显偏高．通过腐蚀形貌观察及腐蚀产物膜分析，发现两种材料的不同腐蚀敏感性行为均是由合金的晶界缺陷所致。并探讨了这种合金具有优良抗污性能的机理．
The reasons of corrosion sensitivity of the alloy in seawater were analyzed by physical testing methods such as metallographic examination and scanning electron microscopy (SEM). The results showed that the corrosion resistance of domestic pipe and sheet of B10 copper-nickel alloy (CDA706) The results show that after 4 years of full sea immersion exposure, the lower corrosion rate of B10 copper pipes at Xiamen Station and Zhoushan Station shows the highest corrosion rate and corrosion morphology. The higher strength of B10 sheet, the average annual corrosion rate showed great temperature sensitivity. The local corrosion of the two materials exposed in Yulin Station was obviously higher. Through the observation of corrosion morphology and the analysis of the corrosion product film, it is found that the different corrosion sensitivity behaviors of the two materials are all caused by the grain boundary defects of the alloy. The mechanism of excellent anti-fouling properties of this alloy was also discussed.