1984-02-01

New Process Technology Required When Introducing Aluminium Parts into the New Volvo 760 Body 840290

INTRODUCTION OF ALUMINIUM as a body construction material requires changes in part design such as added overcrowning, changes in pressing and assembly such as use of rope hemming, introduction of alkaline pickling for better results with welding, bonding, corrosion protection and use of wax when sanding.Changes in painting included the insulation of certain parts when EC-dipping and extensive corrosion testing to find optimum combinations of materials, cleaning and phosphating chemicals.Conventional corrosion-testing methods were found to give misleading results, especially for Al-alloys which contain copper.

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