Effect of three kinds of medium molecular weight proteins on the corrosion resistance of Ni-Ti and stainless steel arch wires
10.12016/j.issn.2096-1456.2019.02.003
- Author:
CUI Ye
1
;
HUANG Ziru
1
;
WANG Chunlin
1
;
LIU Conghua
1
;
ZHANG Chao
1
Author Information
1. Department of Orthodontics, Stomatological Hospital, Southern Medical University
- Publication Type:Journal Article
- Keywords:
Corrosion;
Ni-Ti alloy;
Stainless steel alloy;
Protein adsorption;
Fibrinogen;
Mucin;
Immunoglobulin G
- From:
Journal of Prevention and Treatment for Stomatological Diseases
2019;27(2):83-89
- CountryChina
- Language:Chinese
-
Abstract:
Objective :To explore the influence and mechanism of different types of proteins on the corrosion resistance of alloy to provide a reference for the safe application and surface modification of nickel-titanium (Ni-Ti) and stainless steel bow wires in the clinic.
Methods:The effects of fibrinogen, IgG and mucin on the electrochemical corrosion resistance of Ni-Ti and stainless steel arch wires were tested by the potentiodynamic polarization method, and the repair ability of passive films on surfaces treated with the three proteins were tested by the cyclic polarization method. Inductively coupled plasma optical emission spectrometry (ICP-OES) was used to determine the types of corrosion products, and the surface morphology after corrosion was analyzed by scanning electron microscopy (SEM) and atomic force microscopy (AFM).
Results :The addition of fibrinogen, IgG or mucin to an alloy has different effects on its corrosion resistance. Adding protein can reduce the corrosion resistance of stainless steel alloys and slow the corrosion process of Ni-Ti alloys. The addition of mucin can improve the corrosion resistance of Ni-Ti alloy and the repair ability of passive film. Compared with mucin and IgG, fibrinogen can reduce the pitting resistance of Ni-Ti and stainless steel alloys.
Conclusion :Different types of proteins interact differently with the arch wire, form different deposition morphologies on the surface, and participate differently in the corrosion process of the alloy.
- Full text:3种中分子量蛋白对镍钛和不锈钢弓丝抗腐蚀能力的影响.pdf
