THE ART AND SCIENCE OF SURFACE PROFILE MEASUREMENT

摘要

The role of surface profile in assuring good adhesion of protective coatings is relatively wellrnunderstood. Much of the research upon which this understanding is based was conducted decades ago,rnbefore the advent of many commonly-used computerized measurement systems. In particular, thernmeasuring microscope method of determining depth of profile has long since been replaced in relatedrnapplications by optical interferometric profilometry. That technique and its application to our field arerndiscussed and the three devices commonly used to determine surface profile of blast cleaned surfaces inrnfield applications are reviewed. The devices in question are the visual comparator, replica tape andrnstylus roughness testers. We compare measurements using these different approaches for evidence ofrnrelative bias and discuss errors of measurement and the relationship of those errors to the area sampled.