What coating would you recommend for use on a body panel for a modern family saloon car (e.g. side panels)?
Electrolytic Chromium/Chromium Oxide Coated Steel - Incorrect
as this is used for making can ends and in some light
engineering applications. It provides a barrier coating and is
less suitable for the long life application of an automotive body panel. Try again. |
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Hot-Dip Lead/Tin Alloy Coated Steel - Incorrect,
This provides a barrier coating and is less suitable for the long
life application of an automotive body panel. Try again. |
Hot-Dip Iron-Zinc Alloy Coated Steel (Galvannealed Steel) - Correct,
this is currently the body panel material favoured by most car makers.
It offers the best combination of corrosion protection, formability,
weldability, paintability and cost. |
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Zinc-Nickel Alloy Electro-Coated Steel - Incorrect,
whilst this is comparable in performance and cost to
the galvanneal coating, and is favoured by a few car companies
it is not the most popular choice. Try again. |
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Try again. |
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Try again. |
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Click on your answer to check and make a note of the answer on your notepad.
| If you are not sure, go back to the properties you have
identified (listed below) in order to determine the
optimum steel chemistry, coating and processing route for this
application.
Corrosion Resistance
Formability
Cost
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NOTEPAD
The 3 most important properties for an automotive body panel are:
Corrosion Resistance
Formability
Cost
Typical yield strength level for a family saloon car panel (roof or wing) is:
150 - 250 MPa (more accurately 200 MPa)
A suitable coating for a family saloon car panel
(wing panel) is:
Hot-Dip Iron-Zinc Alloy Coated Steel (Galvannealed
Steel)
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