If you really want to understand something, it pays to take a closer look. In order to be able to describe surface conditions or changes on components or test specimens, nexiss also offers surface measurements in 3D format. By digitising the surface condition, a before and after comparison can be carried out quickly. Only this comparison allows a mathematical-analytical description of a surface change. This makes test results more meaningful and objectively assessable.
With the help of a 3D surface measurement procedure, we record the microstructure of the surface of your component or test specimen for you three-dimensionally and thus completely.
From this measurement, the 3D surface parameters and the 2D profile parameters are determined. Surface parameters describe a surface much better than profile parameters, for example.
You receive reliable, operator-independent measurement results from every area of the test specimen. The microstructure is precisely recorded and displayed in colour via an adjustable scaling. In particular, the colour representation of the surface fineness allows the viewer to quickly and reliably detect relevant areas and define them for further analyses.
With tactile measurement methods, the surface is mapped as a two-dimensional roughness profile (contact section) and the 2D profile parameters (Rz, Ra, Rq, Rmr, Rpk, ...) are then determined from this according to the standard. As the tactile measurement is carried out by means of a measuring tip in the micrometre range, not all microstructures can be recorded. In addition, the hard diamond tip changes the surface and thus also the measurement result. This change is problematic, for example, for subsequent examinations of reaction layers or with very soft surfaces.
Therefore, nexiss uses non-contact optical surface measurement methods with a fine light beam as a better alternative. With this method, all structures can be determined and surfaces of sensitive materials can also be measured. In addition, the optical surface measurement captures the microstructure of a surface three-dimensionally and thus completely. From this measurement, both the 3D surface characteristics (Sa, Sq, Sz, S10z, ...) and the 2D profile characteristics can be determined.
The optical three-dimensional surface measurement generates a data set from which not only the surface roughness, waviness, shape and special characteristics of the surface are determined. In addition, parameters can be calculated that serve to describe the functional behaviour of a surface with regard to friction, wear, tightness, load-bearing capacity and running-in behaviour and characterise the optical appearance.
For surface investigations with regard to corrosion damage or the corrosion protection behaviour of coatings or fluids, the analytical description of the surface change compared to the initial or ideal state is of particular interest. Here, the 3D analysis method used at nexiss offers great advantages, as surfaces of up to 160 cm² can be measured and calculated. In particular, the difference analysis of two surface conditions (e.g. before and after the test) provides the user with a quick and qualified evaluation option.
This increases the quality of trial and test results while at the same time improving work efficiency.
