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Influence of hardening and surface modification of endourological wires on corrosion resistance

Walke W., Przondziono J.

Acta of Bioengineering and Biomechanics

2012

Vol. 14, no. 3

93-99

Guide wires with suitable functional characteristics are of crucial importance for proper urological treatment. This study presents an analysis of the effect of work hardening taking place in the process of wire cold drawing and the effect of surface modification by means of electrochemical polishing and chemical passivation on the resistance of wires made of X10CrNi18-8 steel used in urology. Corrosion resistance was evaluated on the grounds of the registered anodic polarisation curves by means of potentiodynamic method. The tests were made in solution simulating human urine. Anodic polarisation curves were presented for selected wire diameters. Mechanical properties were tested in a static uniaxial tensile test. The course of flow curve as well as mathematical form of flow stress function were determined. Curves presenting the relation of polarisation resistance as a function of strain applied in the drawing process are given. The tests carried out show that surface modification by means of electrochemical polishing and then chemical passivation of wires used in endourological treatment is fundamental.

Bariery cierne we włókiennictwie

Snycerski M.

Tribologia

2001

nr 4

759-771

Barierą cierną we włókiennictwie przyjęto nazywać każdy element maszyny pozostający w bezpośrednim kontakcie ruchowym z półproduktem lub produktem włókienniczym. W ogólnym przypadku są to wszelkiego rodzaju prowadniki i naprężacze. Na wybranych przykładach zastosowań przedstawiono funkcje technologiczne i skutki współpracy liniowych wyrobów włókienniczych z barierami ciernymi

In textile science and technology all elements of machinery coming into contact with moving textile raw materials and products are called frictional barriers. They generally include all kinds of thread guides and tensioners. The paper presents the combined effect of linear textile product and frictional barrier on technological process. The effect of geometrical properties of the barrier on the thread has been presented and analysed.