不同时效态对7150铝合金剥蚀行为的影响

中国腐蚀与防护学报

2010, Vol. 30

Issue (6): 487-490

研究报告

本期目录 | 过刊浏览

不同时效态对7150铝合金剥蚀行为的影响

黄昌龙^1,2,徐海蓉²

1. 西北工业大学航空学院西安 710072
2. 广州民航职业技术学院广州 510403

EFFECTS OF TEMPER ON EXFOLIATION CORROSION OF 7150 ALLOY

HUANG Changlong^1,2, XU Hairong²

1. School of Aeronautics, Northwestern Polytechnic University, Xi'an 710072
2. Guangzhou Civil Aviation College, Guangzhou 510403

全文: PDF(1053 KB)

摘要: 针对老龄飞机7150合金飞机结构普遍存在的剥蚀问题，采用海洋性环境腐蚀试验、透射电子显微镜观测等手段，研究了T6、T73和T77时效态7150合金剥蚀行为。研究结果表明：T77时效态抗剥蚀性能最好，T6时效态抗剥蚀性能最差，T73 时效态介于T77和T6时效态之间。7150-T77合金晶界腐蚀产物的锲力，尚不足以提供其剥蚀扩展所需动力。7150合金时效后的晶界微观组织结构，是抗剥蚀性能的重要决定因素。

关键词 ： 7150铝合金, 剥蚀, 时效态, 晶界析出相, 无弥散区, 基体

Abstract：The effects of temper on EFC of 7150 alloy, which is prevalent on aging airplane structure, had been investigated by means of corrosion test on T6, T73 and T77 temper in oceanic environment and transmission electron microcopy (TEM). The test results shown that T77 temper was the best for EFC resistance, T73 temper was the next and T6 temper was the worst. The test results also shown that the wedging stress produced by the corrosion product at the grain boundary of 7150-T77 alloy can not sustain the EFC development. TEM observation shown that continuous η phase existed at the grain boundary of T6 temper. The grain boundary of T73 and T77 temper had PFZ zone and dispersed η phase. The PFZ of T77 temper was thicker than T73 temper. The particles of η phase at the grain boundary of T77 temper were coarser than T73 temper. We can draw a conclusion that the microstructure in grain boundary zone of 7150 alloy is the key factor to the EFC resistance.

Key words： 7150 alloy exfoliation corrosion temper grain boundary precipitates PFZ matrix

收稿日期: 2010-05-04

ZTFLH:

TG146.1

基金资助:

海南航空股份有限公司技术攻关项目（2006-2009）和中国民航局科技项目

通讯作者: 黄昌龙 E-mail: richardhcl@vip.sina.com

Corresponding author: HUANG Changlong E-mail: richardhcl@vip.sina.com

作者简介: 黄昌龙，1969年生，男，副教授，博士，研究方向为飞机结构维修理论与技术

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引用本文:

黄昌龙,徐海蓉. 不同时效态对7150铝合金剥蚀行为的影响[J]. 中国腐蚀与防护学报, 2010, 30(6): 487-490.
HUANG Chang-Long, XU Hai-Rong. EFFECTS OF TEMPER ON EXFOLIATION CORROSION OF 7150 ALLOY. J Chin Soc Corr Pro, 2010, 30(6): 487-490.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2010/V30/I6/487

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