Improving corrosion stability of Zn-Al-Mg by alloying for protection of car bodies

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22350%2F16%3A43902753" target="_blank" >RIV/60461373:22350/16:43902753 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22310/16:43902753

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.surfcoat.2016.03.062" target="_blank" >http://dx.doi.org/10.1016/j.surfcoat.2016.03.062</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.surfcoat.2016.03.062" target="_blank" >10.1016/j.surfcoat.2016.03.062</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Improving corrosion stability of Zn-Al-Mg by alloying for protection of car bodies

Popis výsledku v původním jazyce

Aluminium and magnesium are known for their ability to improve corrosion performance of zinc coatings used for steel protection in automotive applications. To investigate the inhibiting properties of other elements, series of model Zn-X, Zn-Al-X, Zn-Mg-X and Zn-Al-Mg-X alloys containing 0.2-2 wt% of titanium, mischmetal (mixture of cerium and other lanthanides), zirconium, molybdenum, chromium, boron, gallium, indium, copper, nickel, calcium, manganese and silicon were prepared and their corrosion performance in a cyclic accelerated test and at a marine field site and the ability to provide galvanic protection to steel in defects were characterized. On openly exposed surfaces, none of the investigated elements showed stronger inhibiting effect on atmospheric corrosion than AI and Mg. When exposed to marine climate, it was beneficial to combine Al and Mg. The corrosion stability of Zn-Al-Mg was further improved by addition of a fourth element. Quaternary Zn-Al-Mg-X alloys outperformed binary Zn-X and ternary Zn-Al-X and Zn-Mg-X alloys. In average, mass loss was 4 fold higher in confined zones simulating hem flanges. Strong inhibition with Mg and detrimental effects of Al on corrosion in confined zones was found. Several quaternary Zn-Al-Mg-X alloys with improved corrosion stability in both open and confined configurations were identified.

Název v anglickém jazyce

Improving corrosion stability of Zn-Al-Mg by alloying for protection of car bodies

Popis výsledku anglicky

Aluminium and magnesium are known for their ability to improve corrosion performance of zinc coatings used for steel protection in automotive applications. To investigate the inhibiting properties of other elements, series of model Zn-X, Zn-Al-X, Zn-Mg-X and Zn-Al-Mg-X alloys containing 0.2-2 wt% of titanium, mischmetal (mixture of cerium and other lanthanides), zirconium, molybdenum, chromium, boron, gallium, indium, copper, nickel, calcium, manganese and silicon were prepared and their corrosion performance in a cyclic accelerated test and at a marine field site and the ability to provide galvanic protection to steel in defects were characterized. On openly exposed surfaces, none of the investigated elements showed stronger inhibiting effect on atmospheric corrosion than AI and Mg. When exposed to marine climate, it was beneficial to combine Al and Mg. The corrosion stability of Zn-Al-Mg was further improved by addition of a fourth element. Quaternary Zn-Al-Mg-X alloys outperformed binary Zn-X and ternary Zn-Al-X and Zn-Mg-X alloys. In average, mass loss was 4 fold higher in confined zones simulating hem flanges. Strong inhibition with Mg and detrimental effects of Al on corrosion in confined zones was found. Several quaternary Zn-Al-Mg-X alloys with improved corrosion stability in both open and confined configurations were identified.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JK - Koroze a povrchové úpravy materiálu

OECD FORD obor

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Projekt

—

Návaznosti

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Surface and Coatings Technology

ISSN

0257-8972

e-ISSN

—

Svazek periodika

306

Číslo periodika v rámci svazku

25 November 2016

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

439-447

Kód UT WoS článku

000387631300009

EID výsledku v databázi Scopus

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