| 학회 |
한국공업화학회 |
| 학술대회 |
2012년 봄 (05/09 ~ 05/11, 김대중컨벤션센터) |
| 권호 |
16권 1호 |
| 발표분야 |
전기화학 |
| 제목 |
Growth of zinc phosphate coatings on AZ31 Mg alloy |
| 초록 |
Zinc phosphate coating was formed on AZ31 Mg alloy through a phosphating bath where H3PO4, Zn(NO3)2, NaNO2, NaNO3 and NaF were applied. The formation behavior and morphologies of the coatings were characterized by SEM, OCP, weight balance, EDS, and XRD. It was found that the films grow into two layers of inner layer and outer crystalline layer alloys in the phosphating solution. The crystal layer grows laterally and covers the entire surface after 5 min. EDS and XRD patterns showed that the composition of the crystal is hopeite (Zn3(PO4)2.4H2O). Corrosion potential (Ecorr) of phosphate-treated AZ31 showed more positive value of about -1.3 V vs. SCE than that of Mg AZ31 alloy about -1.66 V vs. SCE. Corrosion rate (icorr) of AZ31 is reduced from 0.2 mA/cm2 to 0.8×10-3 mA/cm2 by phosphating treatment. |
| 저자 |
Phuong NV, 정성희, 이상열, 장도연, 김만, 문성모, 이규환
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| 소속 |
재료(연) |
| 키워드 |
magnesium alloys; zinc phosphate; conversion coating; surface treatment.
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| E-Mail |
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