四种飞机起落架用钢在模拟海水中的腐蚀行为研究  

Corrosion Behavior of Four Steels for Landing Gear of Amphibious Aircraft in Simulated Seawater

作　　者：赵连红 王英芹 刘元海 何卫平 王浩伟 ZHAO Lianhong;WANG Yingqin;LIU Yuanhai;HE Weiping;WANG Haowei(The Key Aeronautic Scientific&Technologic Laboratory of Structure Corrosion Protection and Control,China Special Vehicle Research Institute,Jingmen 448035,China)

机构地区：[1]中国特种飞行器研究所结构腐蚀防护与控制航空科技重点实验室,荆门448035

出　　处：《中国腐蚀与防护学报》2024年第5期1263-1273,共11页Journal of Chinese Society For Corrosion and Protection

摘　　要：采用模拟海水全浸区的人工海水浸泡试验,结合电化学阻抗谱(EIS)测试、动电位极化曲线(PDP)测试、腐蚀产物及表面腐蚀形貌观察、表面三维轮廓及腐蚀产物分析,研究了4种水陆两栖飞机起落架用钢在人工海水溶液中的腐蚀行为。另外,通过腐蚀疲劳试验研究了预腐蚀对4种钢腐蚀疲劳性能的影响。结果表明:4种钢的电化学行为相似,阳极曲线表现出活性溶解特征,阴极过程以氧还原反应为主。失重法计算得出的腐蚀速率大小顺序为:30CrMnSiNi2A>300M>30CrMnSiA>A100。腐蚀产物主要由α-FeOOH、γ-FeOOH、α-Fe_(2)O_(3)和Fe_(3)O_(4)组成,腐蚀呈现均匀腐蚀的特征。预腐蚀使30CrMnSiA、30CrMnSiNi2A和300M钢的疲劳性能劣化而对A100钢的影响较小。A100钢相较于其余3种钢具有更高的耐蚀性,原因主要是其合金成分中较多的Co、Ni、Cr使腐蚀产物具有更好的保护性。The corrosion behavior of four steels 30CrMnSiA,30CrMnSiNi2A,300M and A100 for amphibious aircraft landing gear in an artificial seawater was studied through immersion testing,electrochemical 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 following order:30CrMnSiNi2A>300M>30CrMnSiA>A100.Their corrosion products are consisted mainly ofα-FeOOH,γ-FeOOH,α-Fe_(2)O_(3),and Fe_(3)O_(4).The four steels show uniform corrosion characteristics in artificial seawater environment.After a pre-corrosion treatment,the fatigue property of the steels 30CrMnSiA,30CrMnSiNi2A and 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.

关 键 词：起落架用钢 人工海水 腐蚀产物 电化学行为 腐蚀疲劳 

分 类 号：TM207[一般工业技术—材料科学与工程]