Corrosion behaviour of as-cast ZK40 with CaO and Y additions

Research output: Journal contributionsJournal articlesResearchpeer-review

Standard

Corrosion behaviour of as-cast ZK40 with CaO and Y additions. / BUZOLIN, Ricardo Henrique; MOHEDANO, Marta; MENDIS, Chamini Lakshi et al.
In: Transactions of Nonferrous Metals Society of China (English Edition), Vol. 28, No. 3, 03.2018, p. 427-439.

Research output: Journal contributionsJournal articlesResearchpeer-review

Harvard

BUZOLIN, RH, MOHEDANO, M, MENDIS, CL, MINGO, B, TOLNAI, D, BLAWERT, C, KAINER, KU, PINTO, H & HORT, N 2018, 'Corrosion behaviour of as-cast ZK40 with CaO and Y additions', Transactions of Nonferrous Metals Society of China (English Edition), vol. 28, no. 3, pp. 427-439. https://doi.org/10.1016/S1003-6326(18)64676-X

APA

BUZOLIN, R. H., MOHEDANO, M., MENDIS, C. L., MINGO, B., TOLNAI, D., BLAWERT, C., KAINER, K. U., PINTO, H., & HORT, N. (2018). Corrosion behaviour of as-cast ZK40 with CaO and Y additions. Transactions of Nonferrous Metals Society of China (English Edition), 28(3), 427-439. https://doi.org/10.1016/S1003-6326(18)64676-X

Vancouver

BUZOLIN RH, MOHEDANO M, MENDIS CL, MINGO B, TOLNAI D, BLAWERT C et al. Corrosion behaviour of as-cast ZK40 with CaO and Y additions. Transactions of Nonferrous Metals Society of China (English Edition). 2018 Mar;28(3):427-439. doi: 10.1016/S1003-6326(18)64676-X

Bibtex

@article{e3a827bfee724ded86cb5cee421f90e3,
title = "Corrosion behaviour of as-cast ZK40 with CaO and Y additions",
abstract = "The microstructures of as-cast ZK40, ZK40 with 2% (mass fraction) CaO and ZK40 with 1% (mass fraction) Y were investigated, and the intermetallic phase morphology and the distribution were characterised. By having discrete intermetallic particles at the grain boundaries for the ZK40, the microstructure was modified to a semi-continuous network of intermetallic compounds along the grain boundaries for the ZK40 with CaO or Y additions. The CaO was not found in the microstructure. However, Ca was present in Ca2Mg6Zn3 intermetallic compounds which were formed during casting. Hydrogen evolution and electrochemical impedance spectroscopy tests revealed that the addition of CaO slightly enhanced the corrosion resistance whereas Y had a negative effect on the corrosion resistance of ZK40. Immersion tests showed that severe localised corrosion as well as corrosion along the intermetallic compounds played an important role in the corrosion process of ZK40–Y whereas the localised corrosion was not pronounced for ZK40 or ZK40–CaO alloys. Micro-segregation in the α-Mg matrix was notably higher for the ZK40 alloy compared with the modified alloys. The combination of this effect with a possible formation of a more stable corrosion layer for the ZK40–CaO was attributed as the main reason for an improved corrosion resistance for the ZK40–CaO alloy.",
keywords = "CaO addition, corrosion behaviour, Mg alloy, Y addition, ZK40, Engineering",
author = "BUZOLIN, {Ricardo Henrique} and Marta MOHEDANO and MENDIS, {Chamini Lakshi} and Beatriz MINGO and Domonkos TOLNAI and Carsten BLAWERT and KAINER, {Karl Ulrich} and Haroldo PINTO and Norbert HORT",
year = "2018",
month = mar,
doi = "10.1016/S1003-6326(18)64676-X",
language = "English",
volume = "28",
pages = "427--439",
journal = "Transactions of Nonferrous Metals Society of China (English Edition)",
issn = "1003-6326",
publisher = "Nonferrous Metals Society of China",
number = "3",

}

RIS

TY - JOUR

T1 - Corrosion behaviour of as-cast ZK40 with CaO and Y additions

AU - BUZOLIN, Ricardo Henrique

AU - MOHEDANO, Marta

AU - MENDIS, Chamini Lakshi

AU - MINGO, Beatriz

AU - TOLNAI, Domonkos

AU - BLAWERT, Carsten

AU - KAINER, Karl Ulrich

AU - PINTO, Haroldo

AU - HORT, Norbert

PY - 2018/3

Y1 - 2018/3

N2 - The microstructures of as-cast ZK40, ZK40 with 2% (mass fraction) CaO and ZK40 with 1% (mass fraction) Y were investigated, and the intermetallic phase morphology and the distribution were characterised. By having discrete intermetallic particles at the grain boundaries for the ZK40, the microstructure was modified to a semi-continuous network of intermetallic compounds along the grain boundaries for the ZK40 with CaO or Y additions. The CaO was not found in the microstructure. However, Ca was present in Ca2Mg6Zn3 intermetallic compounds which were formed during casting. Hydrogen evolution and electrochemical impedance spectroscopy tests revealed that the addition of CaO slightly enhanced the corrosion resistance whereas Y had a negative effect on the corrosion resistance of ZK40. Immersion tests showed that severe localised corrosion as well as corrosion along the intermetallic compounds played an important role in the corrosion process of ZK40–Y whereas the localised corrosion was not pronounced for ZK40 or ZK40–CaO alloys. Micro-segregation in the α-Mg matrix was notably higher for the ZK40 alloy compared with the modified alloys. The combination of this effect with a possible formation of a more stable corrosion layer for the ZK40–CaO was attributed as the main reason for an improved corrosion resistance for the ZK40–CaO alloy.

AB - The microstructures of as-cast ZK40, ZK40 with 2% (mass fraction) CaO and ZK40 with 1% (mass fraction) Y were investigated, and the intermetallic phase morphology and the distribution were characterised. By having discrete intermetallic particles at the grain boundaries for the ZK40, the microstructure was modified to a semi-continuous network of intermetallic compounds along the grain boundaries for the ZK40 with CaO or Y additions. The CaO was not found in the microstructure. However, Ca was present in Ca2Mg6Zn3 intermetallic compounds which were formed during casting. Hydrogen evolution and electrochemical impedance spectroscopy tests revealed that the addition of CaO slightly enhanced the corrosion resistance whereas Y had a negative effect on the corrosion resistance of ZK40. Immersion tests showed that severe localised corrosion as well as corrosion along the intermetallic compounds played an important role in the corrosion process of ZK40–Y whereas the localised corrosion was not pronounced for ZK40 or ZK40–CaO alloys. Micro-segregation in the α-Mg matrix was notably higher for the ZK40 alloy compared with the modified alloys. The combination of this effect with a possible formation of a more stable corrosion layer for the ZK40–CaO was attributed as the main reason for an improved corrosion resistance for the ZK40–CaO alloy.

KW - CaO addition

KW - corrosion behaviour

KW - Mg alloy

KW - Y addition

KW - ZK40

KW - Engineering

UR - http://www.scopus.com/inward/record.url?scp=85045108738&partnerID=8YFLogxK

U2 - 10.1016/S1003-6326(18)64676-X

DO - 10.1016/S1003-6326(18)64676-X

M3 - Journal articles

AN - SCOPUS:85045108738

VL - 28

SP - 427

EP - 439

JO - Transactions of Nonferrous Metals Society of China (English Edition)

JF - Transactions of Nonferrous Metals Society of China (English Edition)

SN - 1003-6326

IS - 3

ER -