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| ROLE OF NaCl IN THE ATMOSPHERIC CORROSION OF A3 STEEL |
| Qing Qv;Chuanwei Yan;Wei Bai |
| 云南大学 |
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Abstract The effect of NaCl deposition on the atmospheric co rrosion of A3 steel at 25℃ and 80%RH was investigated.The results showed that w eight loss increased with the amount of NaCl deposition,but it did not change ob viously in the presence of more amount of NaCl deposition after exposure for cer tain time.Scanning electron microscopy(SEM),electron dispersion X-ray analysis(E DAX)and X-ray photoelectron spectroscopy(XPS)were used to study the morphology,e lement composition and valence on the corrosion surface.The surfaces were obviou sly uneven,and some tiny crevices appeared in corrosion products that can help O 2 transmit to inner layer.A brief corrosion mechanism was presented to explain t he experimental observations under this condition.
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Received: 08 October 2001
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Corresponding Authors:
Qing Qv
E-mail: quqing58hotmail.com
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