Effect of Mg content on structure and corrosion behavior of novel hot-dip Al-Zn-Si-rE-Mg coatings

Zhang, Guoqiang; Song, Renbo; Liu, Junyou; Zhao, Shuai; Cai, Changhong

doi:10.1016/j.matlet.2022.133098

Cited by 8 publications

(2 citation statements)

References 18 publications

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“…For the Al-5Zn-4Si-0.15Mg coating, the cathode was oxygen absorption corrosion and hydrogen evolution corrosion during immersion corrosion. The anode was the dissolution of magnesium-rich, zinc-rich, and aluminum-rich phases [24]. With the increase in the immersion time, the polarization curve moved to the left as a whole.…”

Section: Full Immersion Corrosion Of Hot-dip Al-5zn-4si-xmg Coatingmentioning

confidence: 97%

Effect of Mg Addition on Microstructure and Sacrificial Anode Protection Performance of Hot Dip Al-5Zn-4Si-xMg Coating

Liu

Peng

et al. 2023

Coatings

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The effect of Mg addition on the microstructure and sacrificial anode protection performance of a hot-dip Al-5Zn-4Si-xMg coating was studied by scanning electron microscopy (SEM-EDS), an X-ray diffractometer, and an electrochemical workstation. The results showed that Al-Zn-Si alloy was composed of an Al-rich phase and a Zn-rich phase. The MgZn2 phase appears after Mg addition. When the addition of Mg increased to 0.15 wt.%, the Mg2Si phase began to appear in the alloy. The hot-dip Al-5Zn-4Si-xMg coating consisted of Si particles, an Al-rich phase and a Zn-rich phase. When the Mg content increased to 0.15 wt.%, the Mg2Si phase and Al + Zn + MgZn2 eutectoid phase began to appear in the coating. In the full immersion corrosion test of the hot-dip Al-5Zn-4Si-xMg coating, the order of corrosion resistance was 0.15% Mg coating > 0.2% Mg coating > 0.05% Mg coating > 0 Mg coating. In the corrosion process of the hot-dip Al-5Zn-4Si-0.15Mg coating, with the increase in immersion, the self-corrosion current of the coating decreased, and the sacrificial protection performance was the best.

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Section: Full Immersion Corrosion Of Hot-dip Al-5zn-4si-xmg Coatingmentioning

confidence: 97%

Effect of Mg Addition on Microstructure and Sacrificial Anode Protection Performance of Hot Dip Al-5Zn-4Si-xMg Coating

Liu

Peng

et al. 2023

Coatings

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“…[12] The inclusion of magnesium in the Zn-Al coating acts as a corrosion inhibitor by inducing the development of binary and ternary eutectic structures, including the MgZn 2 phase. [13][14][15] Rare earth (RE) elements such as La and Ce can enhance the wettability and adhesion, fostering a more homogeneous microstructure. [16,17] Ma et al [18] found that a Zn-Al-Mg-Sn hot-dip coating led to nano-sized Mg 2 Sn particle formation, which correlated with improved corrosion resistance and microhardness.…”

mentioning

confidence: 99%

The Effects of B on the Microstructure and Corrosion Resistance of Zn–6Al–3Mg Alloy Coating

Chen,

Liu,

et al. 2024

steel research int.

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Hot dip galvanized zinc‐aluminum‐magnesium steel plates are widely used in fields such as power communication, automotive manufacturing, and marine engineering due to their excellent corrosion resistance. The use of microalloying can further improve their corrosion resistance. The effects of B on the microstructure and corrosion resistance of Zn–6Al–3Mg (ZAM) alloy coatings are systematically examined. Data indicates that the eutectic structure of the coating progressively refines as B content increases, concomitant with a reduction in the thickness of the Fe2Al5 inhibition layer owing to the augmented formation of an Al‐rich phase at the surface. When the addition of B reaches 0.12%, the microstructure of the alloy coating is minimized, and there is no further reduction in the thickness of the Fe2Al5 inhibition layer. Moreover, the presence of B diminishes the corrosion current density and bolsters corrosion resistance. Optimal corrosion performance, indicated by maximal density and uniformity of surface corrosion products and the lowest corrosion current density, is achieved at a B addition of 0.12%. The judicious selection of B content is pivotal for enhancing the microstructural and anti‐corrosive properties of ZAM alloy coatings. Therefore, adding 0.12% B to ZAM alloy can effectively improve the microstructure and corrosion resistance of the alloy coating.

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Effect of Pre-oxidation Condition on the Microstructure of a Hot-Dip Galvanized Coating on Nodular Cast Iron

Chen

et al. 2023

J. of Materi Eng and Perform

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Effect of Mg content on structure and corrosion behavior of novel hot-dip Al-Zn-Si-rE-Mg coatings

Cited by 8 publications

References 18 publications

Effect of Mg Addition on Microstructure and Sacrificial Anode Protection Performance of Hot Dip Al-5Zn-4Si-xMg Coating

Effect of Mg Addition on Microstructure and Sacrificial Anode Protection Performance of Hot Dip Al-5Zn-4Si-xMg Coating

The Effects of B on the Microstructure and Corrosion Resistance of Zn–6Al–3Mg Alloy Coating

Effect of Pre-oxidation Condition on the Microstructure of a Hot-Dip Galvanized Coating on Nodular Cast Iron

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