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Woeiren Wang – One of the best experts on this subject based on the ideXlab platform.

  • oxidation resistant silane coating for hot dip galvanized hot stamping steel
    Corrosion Science, 2020
    Co-Authors: Jun-kai Chang, Chao-sung Lin, Weijen Cheng, Ihsuang Lo, Woeiren Wang

    Abstract:

    Abstract A silane coating was developed for hot-dip galvanized (HDG) steel via a sol-gel roll coating method and its oxidation resistance during Austenitization was detailed. The HDG steel with silane coating retains metallic appearance after 900 °C Austenitization for 5 min. Moreover, the silane coating preserves more Zn in the alloy layer, conferring better corrosion resistance. Liquid metal embrittlement is absent when a thinner Zn coating (∼ 7 μm) is applied, yet imparts cathodic protection to the austenitized silane-coated HDG steel with a cosmetic coating. The silane coating markedly inhibits oxidation and confers enhanced corrosion resistance for hot-stamped HDG steel parts.

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  • oxidation and corrosion behavior of commercial 5 wt al zn coated steel during Austenitization heat treatment
    Surface & Coatings Technology, 2018
    Co-Authors: Jun-kai Chang, Chao-sung Lin, Woeiren Wang

    Abstract:

    Abstract A commercial 5 wt% Al-Zn coated steel was employed to detail the microstructural evolution, oxidation, and the related corrosion behavior changes during the Austenitization heat treatment. During the early stages of Austenitization, Fe2Al5Znx phase forms between the coating and the steel substrate. With continued Austenitization, the inner part of the coating transforms to the Γ-Fe3Zn10 phase and the outer part of the coating to the FeAl phase, accompanying with the formation of a thin surface oxide layer mainly composed of Al2O3 with minor ZnO. Subsequently, the coating transforms to the Γ-Fe3Zn10 phase and α-Fe(Zn), and finally to the single α-Fe(Zn) phase. The Al in the coating is distributed mainly on the surface of the alloy layer and suppresses the oxidation of the alloy layer. The Austenitization treatment enriches the coating with Fe, which, in turn, ennobles the corrosion potential and reduces the corrosion current density of the coating. Conversely, the potential difference between the coating and the steel substrate is reduced after Austenitization.

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  • microstructural evaluation and property change of 5 wt pct al zn coating on press hardening steel during Austenitization
    Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science, 2018
    Co-Authors: Jun-kai Chang, Chao-sung Lin, Woeiren Wang, Weijen Cheng

    Abstract:

    Microstructural evolution of a 5 wt pct Al-Zn coating on press hardening steel was studied in comparison to hot-dip galvanized (GI) and galvannealed (GA) coatings. The results show that the presence of 5 wt pct Al effectively suppresses oxidation during Austenitization; meanwhile, the presence of Fe resulting from galvannealing accelerates oxidation. Alloying with Al or Fe in the coating prior to Austenitization reduces the susceptibility to liquid metal embrittlement (LME). The presence of Al in the as-coated Zn coating enhances the corrosion resistance in HCl solution and reduces the cathodic kinetics in NaCl solution. However, for sacrificial protection, the austenitized GI steel outperforms the other austenitized-coated steels. Nevertheless, the 5 wt pct Al-Zn coating exhibits better overall performance including high-temperature oxidation resistance, less LME susceptibility, and cathodic protection.

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Jun-kai Chang – One of the best experts on this subject based on the ideXlab platform.

  • oxidation resistant silane coating for hot dip galvanized hot stamping steel
    Corrosion Science, 2020
    Co-Authors: Jun-kai Chang, Chao-sung Lin, Weijen Cheng, Ihsuang Lo, Woeiren Wang

    Abstract:

    Abstract A silane coating was developed for hot-dip galvanized (HDG) steel via a sol-gel roll coating method and its oxidation resistance during Austenitization was detailed. The HDG steel with silane coating retains metallic appearance after 900 °C Austenitization for 5 min. Moreover, the silane coating preserves more Zn in the alloy layer, conferring better corrosion resistance. Liquid metal embrittlement is absent when a thinner Zn coating (∼ 7 μm) is applied, yet imparts cathodic protection to the austenitized silane-coated HDG steel with a cosmetic coating. The silane coating markedly inhibits oxidation and confers enhanced corrosion resistance for hot-stamped HDG steel parts.

    Free Register to Access Article

  • oxidation and corrosion behavior of commercial 5 wt al zn coated steel during Austenitization heat treatment
    Surface & Coatings Technology, 2018
    Co-Authors: Jun-kai Chang, Chao-sung Lin, Woeiren Wang

    Abstract:

    Abstract A commercial 5 wt% Al-Zn coated steel was employed to detail the microstructural evolution, oxidation, and the related corrosion behavior changes during the Austenitization heat treatment. During the early stages of Austenitization, Fe2Al5Znx phase forms between the coating and the steel substrate. With continued Austenitization, the inner part of the coating transforms to the Γ-Fe3Zn10 phase and the outer part of the coating to the FeAl phase, accompanying with the formation of a thin surface oxide layer mainly composed of Al2O3 with minor ZnO. Subsequently, the coating transforms to the Γ-Fe3Zn10 phase and α-Fe(Zn), and finally to the single α-Fe(Zn) phase. The Al in the coating is distributed mainly on the surface of the alloy layer and suppresses the oxidation of the alloy layer. The Austenitization treatment enriches the coating with Fe, which, in turn, ennobles the corrosion potential and reduces the corrosion current density of the coating. Conversely, the potential difference between the coating and the steel substrate is reduced after Austenitization.

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  • microstructural evaluation and property change of 5 wt pct al zn coating on press hardening steel during Austenitization
    Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science, 2018
    Co-Authors: Jun-kai Chang, Chao-sung Lin, Woeiren Wang, Weijen Cheng

    Abstract:

    Microstructural evolution of a 5 wt pct Al-Zn coating on press hardening steel was studied in comparison to hot-dip galvanized (GI) and galvannealed (GA) coatings. The results show that the presence of 5 wt pct Al effectively suppresses oxidation during Austenitization; meanwhile, the presence of Fe resulting from galvannealing accelerates oxidation. Alloying with Al or Fe in the coating prior to Austenitization reduces the susceptibility to liquid metal embrittlement (LME). The presence of Al in the as-coated Zn coating enhances the corrosion resistance in HCl solution and reduces the cathodic kinetics in NaCl solution. However, for sacrificial protection, the austenitized GI steel outperforms the other austenitized-coated steels. Nevertheless, the 5 wt pct Al-Zn coating exhibits better overall performance including high-temperature oxidation resistance, less LME susceptibility, and cathodic protection.

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Chao-sung Lin – One of the best experts on this subject based on the ideXlab platform.

  • oxidation resistant silane coating for hot dip galvanized hot stamping steel
    Corrosion Science, 2020
    Co-Authors: Jun-kai Chang, Chao-sung Lin, Weijen Cheng, Ihsuang Lo, Woeiren Wang

    Abstract:

    Abstract A silane coating was developed for hot-dip galvanized (HDG) steel via a sol-gel roll coating method and its oxidation resistance during Austenitization was detailed. The HDG steel with silane coating retains metallic appearance after 900 °C Austenitization for 5 min. Moreover, the silane coating preserves more Zn in the alloy layer, conferring better corrosion resistance. Liquid metal embrittlement is absent when a thinner Zn coating (∼ 7 μm) is applied, yet imparts cathodic protection to the austenitized silane-coated HDG steel with a cosmetic coating. The silane coating markedly inhibits oxidation and confers enhanced corrosion resistance for hot-stamped HDG steel parts.

    Free Register to Access Article

  • oxidation and corrosion behavior of commercial 5 wt al zn coated steel during Austenitization heat treatment
    Surface & Coatings Technology, 2018
    Co-Authors: Jun-kai Chang, Chao-sung Lin, Woeiren Wang

    Abstract:

    Abstract A commercial 5 wt% Al-Zn coated steel was employed to detail the microstructural evolution, oxidation, and the related corrosion behavior changes during the Austenitization heat treatment. During the early stages of Austenitization, Fe2Al5Znx phase forms between the coating and the steel substrate. With continued Austenitization, the inner part of the coating transforms to the Γ-Fe3Zn10 phase and the outer part of the coating to the FeAl phase, accompanying with the formation of a thin surface oxide layer mainly composed of Al2O3 with minor ZnO. Subsequently, the coating transforms to the Γ-Fe3Zn10 phase and α-Fe(Zn), and finally to the single α-Fe(Zn) phase. The Al in the coating is distributed mainly on the surface of the alloy layer and suppresses the oxidation of the alloy layer. The Austenitization treatment enriches the coating with Fe, which, in turn, ennobles the corrosion potential and reduces the corrosion current density of the coating. Conversely, the potential difference between the coating and the steel substrate is reduced after Austenitization.

    Free Register to Access Article

  • microstructural evaluation and property change of 5 wt pct al zn coating on press hardening steel during Austenitization
    Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science, 2018
    Co-Authors: Jun-kai Chang, Chao-sung Lin, Woeiren Wang, Weijen Cheng

    Abstract:

    Microstructural evolution of a 5 wt pct Al-Zn coating on press hardening steel was studied in comparison to hot-dip galvanized (GI) and galvannealed (GA) coatings. The results show that the presence of 5 wt pct Al effectively suppresses oxidation during Austenitization; meanwhile, the presence of Fe resulting from galvannealing accelerates oxidation. Alloying with Al or Fe in the coating prior to Austenitization reduces the susceptibility to liquid metal embrittlement (LME). The presence of Al in the as-coated Zn coating enhances the corrosion resistance in HCl solution and reduces the cathodic kinetics in NaCl solution. However, for sacrificial protection, the austenitized GI steel outperforms the other austenitized-coated steels. Nevertheless, the 5 wt pct Al-Zn coating exhibits better overall performance including high-temperature oxidation resistance, less LME susceptibility, and cathodic protection.

    Free Register to Access Article