Water absorption by lacquer coatings

✍ Scribed by Zofia Kolek

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 504 KB
• Volume: 9
• Category: Article
• ISSN: 0894-3214
• DOI: 10.1002/(sici)1099-1522(199603)9:2<99::aid-pts356>3.0.co;2-w

✦ Synopsis

The amount of water absorbed by lacquer coatings on a metallic substrate was determined on t h e basis o f electrical measurements. The time necessary for penetration o f water d o w n 'to t h e substrate was determined which allowed t h e evaluation of diffusion coefficients. Capacitance measurements were also carried out. The results obtained with these t w o methods were consistent within t h e limits o f experimental error. The calculations were made with t h e assumption that t h e transport o f water occurs in accordance with Fick's law. The knowledge o f the diffusion coefficient for water can be t h e basis f o r t h e comparative evaluation o f varnish coating quality from t h e protective properties point o f view.