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J Chin Soc Corr Pro  1982, Vol. 2 Issue (2): 1-9    DOI:
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PHYSICAL CHEMISTRY OF IRON RUST Ⅰ. CONVERSION ELECTRON M SSBAUER SPECTROSCOPY ANALYSIS OF THE BARRIER LAYER RUSTS FORMED ON LOW ALLOY STEELS
Chen Junming Cai Zhenyue Wang Zhijie Wang Caihu and Zhang Houzeng (Shanghai Institute of Metallurgy; Academia Sinica) Hu Wenxiang Yu Fanghua and Zhang Guilin (Shanghai Institute of Nuclear Research; Academia Sinica)
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Abstract  Phase composition of the barrier layer rusts of two alloy steels with different corrosion resistance in sea water was determined by conversion electron Mossbauer spectroscopy for the first time. It seems that, the barrier layer rusts of the two kinds of steel after exposure to air have similar composition. They consist of about 80% β-FeOOH and 20% γ-FeOOH. The problems raised by the above results such as the effect of alloy elements on corrosion process and the formation of the deposited layer rust are discussed. It is suggested that samples taken out from sea water are different from samples in sea water. In the barrier layer rust formed on samples taken out from sea water there remained final state phases (β-,γ-FeOOH)only. The intermediate state phases observed on samples in sea water are lost by oxidation, dehydration and age effect etc. after the samples are taken out from the sea.
Received:  25 April 1982     
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Chen Junming Cai Zhenyue Wang Zhijie Wang Caihu and Zhang Houzeng (Shanghai Institute of Metallurgy; Academia Sinica) Hu Wenxiang Yu Fanghua and Zhang Guilin (Shanghai Institute of Nuclear Research; Academia Sinica). PHYSICAL CHEMISTRY OF IRON RUST Ⅰ. CONVERSION ELECTRON M SSBAUER SPECTROSCOPY ANALYSIS OF THE BARRIER LAYER RUSTS FORMED ON LOW ALLOY STEELS. J Chin Soc Corr Pro, 1982, 2(2): 1-9.

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