介绍了灰靶的基本原理及灰靶构造，并通过应用实例着重探 讨了在输油管道腐蚀研究中灰评估的基本方法、作用及效果.研究结果表明，灰靶方法可以 通过灰等级的方式来客观地描述管道的腐蚀与防护状态.
The fundamental on grey target is introduced,and th e target pattern of grey situation decision is used to evaluate and to classify the comprehensive corrosion and protection status of the underground petroleum p ipeline.The result indicates that the pipeline can be protected perfectly as gre y grade ≤2,and the pipeline runs the risk of corrosion invalidation as the grad e ≥4.Four factorial weights acting corrosion and protection status of the pipe line are separately coating resistance 60.87%,cathodic protected potential 18.84 %,corrosion current density 11.59%,pipe-earth potential 8.70%.The grey target me thod is useful for the preventive repair on pipelines.
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