The effect of mucin, fibrinogen and IgG on the corrosion behaviour of Ni-Ti alloy and stainless steel.
In this study, Ni-Ti alloy and stainless steal were exposed to artificial saliva containing fibrinogen, IgG or mucin, and the resultant corrosion behavior was studied. The purpose was to determine the mechanisms by which different types of protein contribute to corrosion. The effect of different proteins on the electrochemical resistance of Ni-Ti and SS was tested by potentiodynamic polarization, and the repair capacity of passivation film was tested by cyclic polarization measurements. The dissolved corrosion products were determined by ICP-OES, and the surface was analyzed by SEM and AFM. The results showed fibrinogen, IgG or mucin could have different influences on the susceptibility to corrosion of the same alloy. Adding protein lead to the decrease of corrosion resistance of SS, whereas protein could slow down the corrosion process of Ni-Ti. For Ni-Ti, adding mucin could enhance the corrosion stability and repair capacity of passivation film. The susceptibility to pitting corrosion of Ni-Ti and stainless steal in fibrinogen AS is not as high as mucin and IgG AS. There are different patterns of deposition formation on the metal surface by different types of protein, which is associated with their effects on the corrosion process of the alloys.
The Stomatological Hospital of Southern Medical University, Guangdong Provincial Stomatological Hospital, No. 366 South of Jiangnan Road, Guangzhou, 510280, People's Republic of China. 2645491781@qq.com.
Zhang
0000-0002-7652-923X
Z
Chao
The Stomatological Hospital of Southern Medical University, Guangdong Provincial Stomatological Hospital, No. 366 South of Jiangnan Road, Guangzhou, 510280, People's Republic of China.
Xiao
X
Yaomu
The Stomatological Hospital of Southern Medical University, Guangdong Provincial Stomatological Hospital, No. 366 South of Jiangnan Road, Guangzhou, 510280, People's Republic of China.
Liu
L
Chufeng
The Stomatological Hospital of Southern Medical University, Guangdong Provincial Stomatological Hospital, No. 366 South of Jiangnan Road, Guangzhou, 510280, People's Republic of China.
Liu
L
Conghua
D003343:Corrosion; D055664:Electrochemical Techniques; D005340:Fibrinogen / Q000737:chemistry*; D007074:Immunoglobulin G / Q000737:chemistry*; D009077:Mucins / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry*; D012464:Saliva, Artificial / Q000737:chemistry*; D013193:Stainless Steel / Q000737:chemistry*; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
D007074:Immunoglobulin G; D009077:Mucins; D012464:Saliva, Artificial; C040654:titanium nickelide; D013193:Stainless Steel; D009532:Nickel; D005340:Fibrinogen; D014025:Titanium
Corrosion; Ni–Ti alloy; Protein adsorption; Stainless steal