硫酸盐与氯化物比率对铝化钛涂层在模拟垃圾焚烧环境中高温腐蚀性能的影响

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2024-10-30 DOI:10.1016/j.surfcoat.2024.131463

Duoli Wu , Liao Xiang , Jiayin Zheng , Yi Li , Weizhou Li , Chao Zhang

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引用次数: 0

摘要

垃圾焚烧的一个主要问题是过热器管道在高温下的腐蚀。在这种情况下，硫酸盐和氯化物的存在对锅炉的使用寿命构成严重威胁。在这项工作中，采用了包铝法制备铝化钛涂层，然后在 600 °C 下将其置于五种不同比例的 NaCl+Na2SO4 盐组合中 168 小时。结果表明，在存在固体 Na2SO4 沉积物的情况下，铝化钛涂层的腐蚀率极低。加入 1/6 NaCl 会明显加快腐蚀速度。当 NaCl 水平提高到 1/4时，NaCl 和 Na2SO4 之间共晶产生的电化学腐蚀再次显著加剧。

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Impact of sulfate to chloride ratio on titanium aluminide coating's high temperature corrosion performance in settings mimicking waste incineration

One major problem with waste incineration is the corrosion of superheater tubes at high temperatures. The presence of sulfate and chloride in this setting poses a severe risk to the boiler's service life. In this work, pack aluminizing was used to prepare titanium aluminide coatings, which was then subjected to five distinct NaCl+Na₂SO₄ salt combination proportions for 168 h at 600 °C. The outcomes demonstrated that in the presence of solid Na₂SO₄ deposits, titanium aluminide coatings displayed remarkably low corrosion rates. Adding 1/6 NaCl significantly accelerated the rate of corrosion. The electrochemical corrosion resulting from eutectization between NaCl and Na₂SO₄ was again considerably amplified when the NaCl level was raised to 1/4.

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来源期刊

Surface & Coatings Technology 工程技术-材料科学：膜

CiteScore

10.00

自引率

11.10%

发文量

921

审稿时长

19 days

期刊介绍： Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.