Stripping parameters
Dry thermomechanical stripping by cryogenic nitrogen jet

The parameters that influence the stripping method and the stripping results are of several kinds:

• process parameters, which can be set by the operator: nozzle geometry (mainly outlet diameter), set pressure, firing distance, nozzle speed and angle of incidence;

• jet parameters at impact, which depend directly on the process parameters: pressure (static and dynamic), temperature, velocity, density and nature of the jet (multiphase, supercritical, etc.);

Table 1 lists all the parameters for cryogenic nitrogen stripping, together with their value ranges. Process parameters are selected on the basis of the mechanical and thermal properties of the coating and substrate (thermal conductivity, modulus of elasticity and...