动态服役环境金属腐蚀与力学性能关联演化模型研究

陈乾; 王晗; 魏木孟; 姚敬华; 马小兵

doi:10.7643/issn.1672-9242.2026.03.011

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装备环境工程 ›› 2026, Vol. 23 ›› Issue (3) : 96-106. DOI: 10.7643/issn.1672-9242.2026.03.011

专刊——装备服役环境与性能试验

动态服役环境金属腐蚀与力学性能关联演化模型研究

陈乾¹, 王晗¹, 魏木孟², 姚敬华², 马小兵^1,*

作者信息 +

Correlation Models for Metal Corrosion and Mechanical Properties in Dynamic Service Environments

CHEN Qian¹, WANG Han¹, WEI Mumeng², YAO Jinghua², MA Xiaobing^1,*

Author information +

文章历史 +

摘要

目的针对跨海域装备在动态环境下金属腐蚀量与力学性能退化难以精准预测的问题,探究动态海洋环境对金属材料腐蚀动力学及承载能力衰减的非线性加速效应。方法以实船搭载暴露3 a的945钢为研究对象,提出一种基于加速效应等同性的动态环境等效折算方法,将时序波动的温湿度历程转化为等效恒定环境值。在此基础上,构建包含温湿度加速项的多元非线性腐蚀质量损失预测模型。最后,基于点蚀诱发宏观应力集中的物理机制,建立以腐蚀质量损失为中间变量的对数型腐蚀-力学性能关联演化预测模型。结果考虑动态非线性加速效应后,实船航线的等效温度（21.34 ℃）和等效相对湿度（73.70%）均显著高于名义平均值。多元腐蚀退化模型各验证节点的预测相对误差均在12%以内,建立的±2σ概率包络带有效覆盖了实测离散点。腐蚀-力学性能关联演化模型刻画了强度“初期陡降、后期趋缓”的退化特征,拉伸与屈服强度的全验证周期预测相对误差低于3%。结论突破了传统均值折算方法严重低估了动态环境腐蚀严酷度的局限,所提出的“环境等效折算-腐蚀质量损失预测-力学性能映射”关联建模框架,能够高精度、高可靠地量化时序波动环境对金属材料腐蚀性能与力学性能的损伤作用,为远洋航行装备的结构安全评估与视情维护提供了量化方法。

Abstract

To address the challenge of accurately predicting metal corrosion and mechanical property degradation of cross-sea equipment operating in dynamic marine environments, the work aims to investigate the nonlinear acceleration effects of dynamic marine environments on corrosion kinetics and load-bearing capacity decay of metal materials. Focusing on 945 steel subjected to three-year real-ship exposure, a dynamic environmental equivalent conversion method based on acceleration-effect equivalence was proposed to transform fluctuating temperature and humidity histories into equivalent constant environmental values. Building upon this, a multivariate nonlinear corrosion weight-loss prediction model incorporating temperature and humidity acceleration terms was developed. Furthermore, grounded in the physical mechanism of macro-scale stress concentration induced by pitting corrosion, a logarithmic corrosion-mechanical property association-evolution model was established, with corrosion weight loss serving as the intermediate linking variable. In consideration of dynamic nonlinear acceleration, the equivalent temperature (21.34 ℃) and equivalent relative humidity (73.70%) along the actual ship route were significantly higher than their nominal arithmetic averages. The multivariate corrosion degradation model achieved a relative prediction error within 12% across all validation nodes, and the constructed ±2σ probability envelope effectively encompassed the measured discrete data points. Moreover, the corrosion-mechanical association-evolution model successfully captured the characteristic strength degradation pattern of “initial sharp drop followed by gradual stabilization”, with relative prediction errors for both tensile and yield strength remaining below 3% throughout the entire validation period. By overcoming the limitations of traditional average-value conversion methods, which severely underestimate the severity of corrosion in dynamic environments the proposed cascaded modeling framework—integrating “environmental equivalent conversion-corrosion weight loss prediction,-mechanical property mapping”-enables high-precision and high-reliability quantification of material corrosion and mechanical damage under temporally fluctuating marine conditions, thereby providing a robust quantitative methodology for structural safety assessment and condition-based maintenance of long-range maritime equipment.

导出引用

陈乾, 王晗, 魏木孟, 姚敬华, 马小兵. 动态服役环境金属腐蚀与力学性能关联演化模型研究[J]. 装备环境工程. 2026, 23(3): 96-106 https://doi.org/10.7643/issn.1672-9242.2026.03.011

CHEN Qian, WANG Han, WEI Mumeng, YAO Jinghua, MA Xiaobing. Correlation Models for Metal Corrosion and Mechanical Properties in Dynamic Service Environments[J]. Equipment Environmental Engineering. 2026, 23(3): 96-106 https://doi.org/10.7643/issn.1672-9242.2026.03.011

中图分类号： TG172

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