Table 1.

The electrochemical parameters of various zones of the ZX00 screw were extrapolated using the Tafel method.

Zone of the screw	Ecorr (V/Ref)	icorr (μA/cm2)	Eb (V/Ref)
head	−1.82	32	−1.70
valley	−1.86	21	−1.65
tip	−1.85	24	−1.71