Prakt. Met. Sonderband 46 (2014) 373 
SURFACE CHARACTERIZATION THROUGH HIGH 
auf das RESOLUTION OPTICAL 3D MEASUREMENT 
Teil 1%, R. Danzl 
echanischen Alicona Imaging GmbH, Raaba/Graz, Austria 
381 
chaften von 
ABSTRACT 
senmetallen®, } Co C 
The optical 3D measurement principle Focus-Variation enables the repeatable and 
traceable measurement of micro-structured surfaces including corrosion and other surface 
minium- und defects. The system combines the functionalities of a coordinate measurement system 
Giesserei- and the technology of a surface measurement device. This allows users to measure form 
and roughness with only one system. Also components with steep flanks and varying 
c d surface finishes are measured with a vertical resolution of up to 10nm. Consequently, this 
+ Compute detailed surface characterization allows the analysis of different forms of corrosion, 
corrosive data and clarification of individual corrosive mechanics. The knowledge about 
sasurement”, circumstances causing erosive and corrosive attack of material surfaces and protective 
layers of components leads to the establishment of new guidelines to develop more 
resistant material. 
romechanik®, 
onents”, Int. 1. INTRODUCTION 
e Bewertung The ability to measure polished and strongly reflective surfaces with steep flanks including 
Computer- color information is mandatory when it comes to performing meaningful corrosive 
investigations. Particularly, the evaluation and measurement of pit and degradation depths 
via surface and roughness measurements plays an important role. These measurement 
3 statischen results are the basis for further research and development activities. Target is the 
“, Bachelor development of new measures to strengthen corrosive resistance of metallic components. 
skonzept für 
chtlich ihrer 2. CHARACTERISTICS AND IMPACTS OF CORRODED SURFACES 
-Rundschau. 
Irrespective of the type of corrosion, attacked surfaces usually show steep flanks and 
strongly varying reflection properties. Targeting the aim of strengthening corrosion 
resistance, measurement instruments have to meet specific requirements: measurement 
of highly polished surfaces, flanks of more than 80° and color visualization to make sure 
that surfaces are measured effectively. Also, high resolution measurements on 
mechanically polished surfaces with a roughness Ra > 50nm and the measurement of 
large measurement fields are of high importance. 
Corrosion yearly causes a remarkable loss of the gross domestic product. Besides various 
rather predictable forms of corrosion that cause general corrosive attack, the industry also 
faces several hardly predictable corrosive forms that affect components locally. As 
corrosive attacks can lead to sudden damage and breakdowns of buildings, industrial