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Critical Issues for Chrome-free Pretreatment of Aluminium Alloys

Critical Issues for Chrome-free Pretreatment of Aluminium Alloys

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<strong>Critical</strong> <strong>Issues</strong> <strong>for</strong> <strong>Chrome</strong>-<strong>free</strong> <strong>Pretreatment</strong> <strong>of</strong> <strong>Aluminium</strong> <strong>Alloys</strong><br />

Low Fluoride<br />

Alloy AA6111 250 hour Lockheed corrosion test<br />

High Fluoride<br />

Zr/Ti fluoroacid<br />

Unground area<br />

Ground area<br />

10 mm<br />

International Conference on Environmental friendly <strong>Pretreatment</strong>s fo <strong>Aluminium</strong> and other Metals, Oslo, Norway, June 16-18, 2004

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