A comparison of contact angle measurement results obtained on bare, treated, and coated alloy samples by both dynamic sessile drop and Wilhelmy method

摘要

The goal of this work was to compare the performance ofudour home-built dynamic sessile drop contact angle (CA) goniometer with our NIMA Dynamic Surface Tensiometer. WaterudCA measurements on different alloy samples (aluminium brass,udcopper–nickel 70/30, stainless steel 304) have been carriedudout by 1) sessile drop and 2) Wilhelmy plate method. Different sets of substrates were cleaned; cleaned and pre-treated; cleaned, pre-treated and coated with atactic polystyrene.udDuring these experiments, the main features of the two setups in connection with our sample properties were understood.