Abstract：To study stress corrosion and chemical corrosion coupling effect，the corrosion environment and the corrosion situation of anchors，where the anchors are buried in the Jiaodong Coal Mine in Jiaozuo City，Henan Province，are discussed. The spot corrosion，pitting corrosion，weight loss，corruption speed and strength loss rate，etc. are study. The results show that the strength loss rate of naked-scaled anchor is about 14.0%，the diameter loss about 10.0%，and the sectional area loss about 19.0% under the medium corrosion condition. Especially，the weight loss rate is extremely unevenly distributed：the maximum rate is about 24.4 times against the minimum one. After 17 years，the limit tension load is 18.4%–22.2% lower than that of the new one. The data of durability and service life of the 17-year anchor are acquired，which can provide references to the investigation of the protective countermeasure against the corrosion of anchor.
