Subject Passivation Based on Trivalent Chromium - SurTec
Subject Passivation Based on Trivalent Chromium - SurTec
Subject Passivation Based on Trivalent Chromium - SurTec
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<str<strong>on</strong>g>Passivati<strong>on</strong></str<strong>on</strong>g> Process<br />
Cleaning<br />
mild alkaline<br />
pH 8-9<br />
50-60 °C<br />
1-15 min<br />
<strong>SurTec</strong> 133<br />
Etching<br />
highly alkaline<br />
50-60 °C<br />
1-5 min<br />
<strong>SurTec</strong> 181<br />
Desmutting<br />
str<strong>on</strong>gly acidic<br />
15-25 °C<br />
1-5 min<br />
<strong>SurTec</strong> 495<br />
Between each step, the surface must be rinsed.<br />
In case of laquering: C<strong>on</strong>ductivity of the last rinse
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