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The effect of Pigment volume concentration on corrosion protection of new sacrificial coating

โœ Scribed by J. Shao; P. Wan; X. Liu; H. Lu; S. Zhang


Publisher
John Wiley and Sons
Year
1995
Tongue
German
Weight
526 KB
Volume
46
Category
Article
ISSN
0947-5117

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โœฆ Synopsis


A new type of sacrificial coating (named SA coating) was developed by adopting anodic pigment of aluminum based alloy powder to make the underlying metal more negative than its corrosion potential. The effects of the Pigment Volume Concentration (PVC) on corrosion protection for the substrate metal were studied by potential monitoring, AC impedance measurement, salt water immersion, and routine tests. Optimum pigment volume concentration range was determined to provide satisfactory corrosion protection and the protective mechanisms were proposed to explain the experimental results.

Ein neuer Typ von galvanisch wirkender Beschichtung (SA Beschichtung) wurde auf der Basis eines anodischen Pigments aus einem Aluminiumlegierungspulver entwickelt, wobei das Potential des darunterliegenden Metalls unterhalb seines freien Korrosionspotentials verschoben wird. Der EinfluS der Pigmentvolumenkonzentration (PVC) auf den Korrosionsschutz des Substratmetalls wurde mittels Potentialmessung, AC Impedanzmessung, Salzwassertauchversuchen und Routinetests untersucht. Urn einen ausreichenden Korrosionsschutz zu gewahrleisten, wurde ein optimaler Bereich der Volumenkonzentration des Pigments ermittelt. Schutzmechanismen, die die experimentellen Ergebnisse erklaren, werden vorgeschlagen.


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