四种飞机起落架用钢在模拟海水中的腐蚀行为研究

doi:10.11902/1005.4537.2023.373

中国腐蚀与防护学报

2024, Vol. 44

Issue (5): 1263-1273 CSTR: 32134.14.1005.4537.2023.373 DOI: 10.11902/1005.4537.2023.373

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四种飞机起落架用钢在模拟海水中的腐蚀行为研究

赵连红(

), 王英芹, 刘元海, 何卫平, 王浩伟

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

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

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

引用本文:

赵连红, 王英芹, 刘元海, 何卫平, 王浩伟. 四种飞机起落架用钢在模拟海水中的腐蚀行为研究[J]. 中国腐蚀与防护学报, 2024, 44(5): 1263-1273.
Lianhong ZHAO, Yingqin WANG, Yuanhai LIU, Weiping HE, Haowei WANG. Corrosion Behavior of Four Steels for Landing Gear of Amphibious Aircraft in Simulated Seawater[J]. Journal of Chinese Society for Corrosion and protection, 2024, 44(5): 1263-1273.

全文: PDF(17542 KB) HTML

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-Fe₂O₃和Fe₃O₄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。

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

Abstract：

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 of α-FeOOH, γ-FeOOH, α-Fe₂O₃, and Fe₃O₄. 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.

Key words： steels for landing gear artificial seawater corrosion product electrochemical behavior corrosion fatigue

收稿日期: 2023-11-23 32134.14.1005.4537.2023.373

ZTFLH:

TM207

通讯作者: 赵连红，E-mail: zhaolianhongmail@163.com，研究方向为材料腐蚀与防护

Corresponding author: ZHAO Lianhong, E-mail: zhaolianhongmail@163.com

作者简介: 赵连红，男，1988年生，硕士，高级工程师

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表1 4种超高强度钢的化学成分

图1 30CrMnSiA、30CrMnSiNi2A、300M和A100钢金相组织的SEM图和光学显微镜图

图2 腐蚀疲劳试样示意图

图3 4种钢在人工海水中的电化学测试结果

表2 动电位极化曲线拟合得到的电化学参数

图4 30CrMnSiA、30CrMnSiNi2A、300M和A100钢浸泡28 d后的宏观形貌

表3 电化学阻抗谱拟合的电化学参数

图5 4 种钢浸泡28 d后的腐蚀速率

图6 30CrMnSiA、30CrMnSiNi2A、300M和A100钢浸泡28 d后表面腐蚀产物的XRD谱

图7 30CrMnSiA、30CrMnSiNi2A、300M和A100钢浸泡28 d后的腐蚀产物形貌和去除腐蚀产物腐蚀表面形貌及三维轮廓图

图8 30CrMnSiA、30CrMnSiNi2A、300M和A100钢在人工海水中浸泡28 d后的截面形貌及元素面扫图

表4 4种钢的横截面EDS结果中的元素含量

图9 4种钢预腐蚀28 d后的腐蚀疲劳断口形貌

图10 4种钢预腐蚀前后的疲劳寿命

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