EFFECT OF FLUID-DYNAMICS ON CORROSION OF COPPER-BASE ALLOYS IN SEA-WATER

被引:66
作者
EFIRD, KD [1 ]
机构
[1] INT NICKEL CO INC,FRANCIS L LAQUE CORROS LAB,WRIGHTSVILLE BEACH,NC 28480
关键词
D O I
10.5006/0010-9312-33.1.3
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A technique for testing materials in sea water under velocity conditions has been developed which utilizes fluid dynamics to evaluate the corrosion test results. The data obtained from this technique may then be applied to other hydrodynamic systems where the fluid dynamics equations are known. This allows high velocity corrosion data to be applied in a scientific and accurate manner. The copper-base alloys are shown to be susceptible to a critical surface shear stress in sea water where film breakdown begins and accelerated attack is initiated. When the critical sheer stress is exceeded in a hydrodynamic system, the corrosion product film of a copper-base alloy degrades and is physically removed. At this point, the shear stress is greater than the binding force of the corrosion product film. This allows localized corrosion and/or accelerated general corrosion to occur.
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页码:3 / 8
页数:6
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