氧化不同时间<strong>(Ni, Pt)Al</strong>涂层的退除及再涂覆行为研究

doi:10.11902/1005.4537.2024.226

中国腐蚀与防护学报

2025, Vol. 45

Issue (1): 201-208 CSTR: 32134.14.1005.4537.2024.226 DOI: 10.11902/1005.4537.2024.226

研究报告

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氧化不同时间(Ni, Pt)Al涂层的退除及再涂覆行为研究

张彩云¹^,², 李帅², 鲍泽斌¹^,²(

), 朱圣龙¹^,², 王福会¹

1 东北大学腐蚀与防护中心沈阳 110819
2 中国科学院金属研究所师昌绪先进材料创新中心沈阳 110016

Stripping and Refurbishment of (Ni, Pt)Al Coating After Service for Different Oxidation Durations

ZHANG Caiyun¹^,², LI Shuai², BAO Zebin¹^,²(

), ZHU Shenglong¹^,², WANG Fuhui¹

1 Corrosion and Protection Center, Northeastern University, Shenyang 110819, China
2 Shi -Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

引用本文:

张彩云, 李帅, 鲍泽斌, 朱圣龙, 王福会. 氧化不同时间(Ni, Pt)Al涂层的退除及再涂覆行为研究[J]. 中国腐蚀与防护学报, 2025, 45(1): 201-208.
Caiyun ZHANG, Shuai LI, Zebin BAO, Shenglong ZHU, Fuhui WANG. Stripping and Refurbishment of (Ni, Pt)Al Coating After Service for Different Oxidation Durations[J]. Journal of Chinese Society for Corrosion and protection, 2025, 45(1): 201-208.

全文: PDF(15278 KB) HTML

摘要:

本文研究了(Ni, Pt)Al涂层氧化不同时间后涂层退除及再涂覆，尤其不同服役时间氧化后涂层及下方基体合金组织结构的演变。采用电镀Pt层和化学气相渗铝的方法在镍基单晶高温合金上制备了(Ni, Pt)Al涂层，然后对涂层试样在1100 ℃中分别氧化300、1000和3000 h。表明不同时间氧化后涂层表面生成的氧化产物都为Al₂O₃；随着氧化时间的增长，涂层退化严重且涂层下方析出的TCP相增多。在HCl和C₆H₈O₇·H₂O的混合溶液中成功退除不同时间氧化后的(Ni, Pt)Al涂层，涂层的退除主要是沿晶界溶解，并随着Al含量的减少，溶解速率下降，而重新沉积的(Ni, Pt)Al涂层微观组织结构差异不大，长时间氧化后的试样单晶基体侧粗大TCP相析出增多。

关键词 ：高温合金, (Ni, Pt)Al涂层, 高温氧化, 涂层退除, 再涂覆

Abstract：

The stripping and refurbishment of single-phase (Ni, Pt)Al coating after oxidation for different times was investigated, especially in terms of the microstructure evolution of coating and substrate. The (Ni, Pt)Al coating was prepared on a Ni-based single crystal superalloy N5 firstly via electro-deposition of a thin Pt-film and followed by above-pack aluminizing. Afterwards, the prepared (Ni, Pt)Al coating/N5 alloy was oxidized in air at 1100 ^oC for 300, 1000 and 3000 h, respectively, where in all cases Al₂O₃ was the exclusive oxide product on all the test coatings. Moreover, with the increase of oxidation time, the coating degraded severely and coarse TCP precipitates emerged out beneath the coating. The (Ni, Pt)Al coatings after oxidation for various times were successfully removed with mixed solution of HCl and C₆H₈O₇·H₂O. Finally, a fresh (Ni, Pt)Al coating was refurbished again on the alloy of the deteriorated coating being removed. During the stripping with mixed acids, the dissolution of coating is mainly ascribed to corrosion of grain boundaries, while the dissolution rate decreases with the reduction of Al-content. However, the microstructure of the refurbished (Ni, Pt)Al coating is little different from those prepared on the as received alloy, nevertheless, it is observed that the coarse precipitates of TPC phase emerged on the alloy side after long time oxidation.

Key words： superalloy (Ni, Pt)Al coating high-temperature oxidation stripping refurbishment

收稿日期: 2024-07-26 32134.14.1005.4537.2024.226

ZTFLH:

TG172

基金资助:国家自然科学基金(52301116; 51671202)

通讯作者: 鲍泽斌，E-mail：zbbao@imr.ac.cn，研究方向为高性能高温防护热障涂层体系

Corresponding author: BAO Zebin, E-mail: zbbao@imr.ac.cn

作者简介: 张彩云，女，1995年生，博士生

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https://www.jcscp.org/CN/10.11902/1005.4537.2024.226 或 https://www.jcscp.org/CN/Y2025/V45/I1/201

图1 (Ni, Pt)Al涂层的表面和截面形貌以及XRD图谱

图2 (Ni, Pt)Al-O300、(Ni, Pt)Al-O1000和(Ni, Pt)Al-O3000涂层样品的XRD图谱

图3 (Ni, Pt)Al-O300、(Ni, Pt)Al-O1000和(Ni, Pt)Al-O3000样品的表面形貌

图4 (Ni, Pt)Al-O300、(Ni, Pt)Al-O1000和(Ni, Pt)Al-O3000样品的截面形貌

表1 图4中所标记各区域中EDS分析结果 (atomic fraction / %)

图5 (Ni, Pt)Al-O300涂层退除后的表面和截面形貌图

表2 图5中标记点处的EDS分析结果 (atomic fraction / %)

图6 (Ni, Pt)Al涂层氧化后退除不同时间后的截面形貌图

图7 (Ni,Pt)Al-R300、(Ni,Pt)Al-R1000和(Ni,Pt)Al-R3000样品的XRD图谱

图8 (Ni,Pt)Al-R300、(Ni, Pt)Al-R1000和(Ni, Pt)Al-R3000涂层表面和截面形貌图

图9 (Ni, Pt)Al-R300、(Ni, Pt)Al-R1000和(Ni, Pt)Al-R3000涂层的EBSD图

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