The polarization transfer coefficients Kxx', Kyy' and Kzx' in the reaction 2H(p,p)2H have been measured at an incident proton energy of 22.5 MeV. The results are compared to predictions from Faddeev calculations using various nucleon-nucleon potential models. The overall agreement is rather good. The comparison in more detail shows a pronounced sensitivity of the results, especially for Kyy', to the 3S1-3D1 and 1P1 NN force components. As in nucleon-nucleon scattering, however, these two parameters are correlated, thus hampering definite conclusions.