Corrosion Behavior of Four Steels for Landing Gear of Amphibious Aircraft in Simulated Seawater
The corrosion behavior of four steels 30CrMnSiA,30CrMnSiNi2A,300M and A100 for am-phibious aircraft landing gear in an artificial seawater was studied through immersion testing,electro-chemical methods,microscopic morphology,three-dimensional morphology observation,and corrosion product characterization.In addition,the effect of pre-corrosion on the corrosion fatigue performance of the four steels was also investigated.The results show that the electrochemical behavior of the four steels is similar:i.e.the anodic curve exhibits active dissolution characteristics,and the cathodic process is dominated by oxygen reduction reaction.The corrosion rate of the four steels may be ranked in the fol-lowing order:30CrMnSiNi2A＞300M＞30CrMnSiA＞A100.Their corrosion products are consisted mainly of α-FeOOH,γ-FeOOH,α-Fe2O3,and Fe3O4.The four steels show uniform corrosion characteristics in arti-ficial seawater environment.After a pre-corrosion treatment,the fatigue property of the steels 30CrMn-SiA,30CrMnSiNi2Aand 300M may be deteriorated,but A100 steel is suffered from little effect.The A100 steel presents better seawater corrosion resistance than the other three,mainly because its much higher Co,Ni and Cr content,so that results in corrosion products of better protection performance.
steels for landing gearartificial seawatercorrosion productelectrochemical behaviorcorrosion fatigue
万方数据
维普
