This work is a part of a larger research program were steel with different zinc coatings are exposed on a worldwide basis on well characterized exposure sites in Europe, Asia and North America, see Table 1.
Corrosion rates of hot dip galvanized steel and zinc aluminum coated steel (e.g. Zn5%Al and Zn 55% Al) were determined after 1, 2, 4 and 6 years of exposure under different climatic conditions.
The formation and development of corrosion products was followed by detailed analysis of samples exposed 0.5, 1, 2, 4 and 6 years using XRD, FTIR-spectroscopy and SEM-EDS. The data are discussed in view of current knowledge in the atmospheric corrosion of zinc, HDG and Zn-Al coated steel materials [1-6]
Table 1. Test sites in the exposure program
Code |
Name |
Country |
Distance to Sea(m) |
A |
Brest |
France |
<5 |
B |
Bohus-Malmön (I) |
Sweden |
<5 |
C |
Bohus-Malmön (II) |
Sweden |
300 |
D |
Ijmuiden |
Netherlands |
2600 |
E |
Cadiz |
Spain |
750 |
F |
Jiangjin |
China |
̴900 km |
G |
Ostrawa |
Czech Republic |
̴500 km |
H |
Dubai |
UAE |
2000 |
I |
Daytona Beach |
USA |
100 |
J |
Quindao |
China |
10 |
K |
Wanning |
China |
100 |
L |
Bangkok |
Thailand |
35 km |
M |
Sattahip |
Thailand |
10 |
N |
Singapore |
SIngapore |
10 |
References
1-I. Odnevall, C. Leygraf, Corros. Sci. 34 (1993) 1213–1229.
2- I. Odnevall, C. Leygraf, Corros. Sci. 36 (1994) 1551–1567.
3- N. Le Bozec, D. Thierry, M. Rohwerder, Dan Persson, G. Luckeneder and L. Luxem, Effect of CO2 on the atmospheric corrosion of ZnMgAl coated steel, Corrosion Science, 74, pp 379-386, 2013
4- E. Diller, B. Lescop, S. Rioual, G Nguyen, D. Thierry and B. Rouvello, Initial formation of corrosion products on pure zinc and MgZn2 examined by XPS: Corrosion Science 79, pp 83-88, 2014.
5- D. Persson, N. Le Bozec, T. Prosek, D. Thierry, G. Luckenader , Corrosion Science Vol 90, pp 276-283, 2015.
6- D. Persson, D. Thierry, N. Le Bozec: Corrosion products formation on Zn55Al upon exposure in marine atmosphere, Corrosion Science, 720, 2011.