Critical Issues for Chrome-free Pretreatment of Aluminium Alloys
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 />
Alloy AA6111 Lockheed corrosion test after 220 grit grinding<br />
(no PB)<br />
degreased<br />
(PB)<br />
degreased<br />
(PB)<br />
Etched 2 sec.<br />
(PB)<br />
Etched 5 sec.<br />
(PB)<br />
Etched 10 sec.<br />
(PB)<br />
Etched 30 sec.<br />
(PB)<br />
Etched 60 sec.<br />
1000hrs<br />
250hrs<br />
115hrs<br />
48hrs<br />
20 mm<br />
International Conference on Environmental friendly <strong>Pretreatment</strong>s fo <strong>Aluminium</strong> and other Metals, Oslo, Norway, June 16-18, 2004