Study on Corrosion Behavior of Ti-Ni-Nb Shape Memory Alloy and 1Cr18Ni9Ti Stainless Steel Aeroplane Pipe System



The susceptibility to stress corrosion cracking (SCC) and galvanic corrosion of an aeroplane pipe made of 1Cr18Ni9Ti connected with a pipe coupling that made of Ti-Ni-Nb shape memory alloy were evaluated. SCC test was completed under simulated service environment in 6% NaCl solution through a self-designed corrosive system. Galvanic corrosion behavior of Ti-Ni-Nb/1Cr18Ni9Ti couple was conducted in 3.5% NaCl solution at 30°C, in which galvanic corrosion current (Ig) and galvanic corrosion potential (Eg) were monitored. The corrosion morphology was observed by using scanning electronic microscope (SEM) and optical microscope (OM) after SCC test and galvanic test. It was showed that no obvious corrosion was detected on the surface of the whole pipe system after the simulated test. The two metals showed excellent resistance to SCC based on the section morphology observation. The average galvanic corrosion current of 1Cr18Ni9Ti/Ti-Ni-Nb couple was 0.13µA/cm2. No obvious corrosion pitting was detected on the surface of the two alloys by OM observation. Therefore, 1Cr18Ni9Ti pipe was safely connected with Ti-Ni-Nb pipe coupling in aeroplane pipe system.




David M. Batisdas and Y.Q. Chang




J. X. Shi and J. H. Liu, "Study on Corrosion Behavior of Ti-Ni-Nb Shape Memory Alloy and 1Cr18Ni9Ti Stainless Steel Aeroplane Pipe System", Advanced Materials Research, Vol. 668, pp. 808-813, 2013


March 2013




[1] F.E. Varela, Y. Kurata, N. Sanada. The Influence of Temperature on the Galvanic Corrosion of a Cast Iron-Stainless Steel Couple (Presiction by Boundary Element Method)., Corros. Sci., Vol. 39(1997), p.775.


[2] B. H Choi., A. Chudnovsky. Stress Corrosion Crack in Pipe Grade Steels in Near Neutral pH Environment., Int. J. Fracture, Vol. 116 (2002), pp.43-48.

[3] I.A. Dolgov, V.A. Gorchakov, Y.P. Surkov, et al. Rybalko. Feasibility of Diagnosing Corrosion Cracking in Main Pipelines., Russ. J. Nondestr. Test, Vol. 38 (2002), pp.26-36.

[4] D. Hornbach and P. Prevéy. Reducing Corrosion Fatigue and SCC Failures in 300M Steel Landing Gear Using Low Plasticity Burnishing. Lambda Technologies, Vol. 9 (2007), pp.17-20.


[5] M.R. Bayoumi. The Mechanics of Fracture in Stress Corrosion Cracking of Aluminium Alloys., Eng. Fract. Mech., Vol. 54(1996), pp.879-889.


[6] J.H. Liu, J.X. Shi, S.M. Li. Effects of Electroplated Coatings on Corrosion Behavior of Ti-1023/30CrMnSiA Galvanic Couple. Journal of Wuhuan University of Technology-Mater. Sci. Ed., Vol. 23(2008), pp.704-707.


[7] R.K. Singh Raman, B.C. Muddle. Stress corrosion cracking of vessels and pipes for alumina processing in aggressive caustic solutions., Int. J. Pres. Ves. Pip., Vol. 81(2004), p.557–561.


[8] M.E. El-Dahshan, A.M.S. El Din, H.H. Haggag. Galvanic corrosion in the systems titanium/316L stainless steel/Al brass in Arabian Gulf water., Desalination, Vol. 142(2002), pp.161-169.