Biological fouling and corrosion resistance of Ni-based coating on AH32

IF 2.4 4区材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS

Surface Engineering Pub Date : 2023-04-03 DOI:10.1080/02670844.2023.2233258

Zhiwei Su, Yanwen Zhou, Yan Caibo, Zhang Kaice

引用次数: 0

Abstract

ABSTRACT To reduce the destruction of organic biological fouling in marine steel, nickel-based (NiCrAlY) transition coatings with and without silver (Ag) doping were prepared on AH32 marine steel by plasma spraying. The coatings exhibited a layered structure, and AlNi3 (111), (200), and (220) diffraction peaks were detected. The Ag (111) peaks were also observed for the Ag-doped coatings. The number of sulphate-reducing bacteria (SRB) adsorbed on the coating surfaces reduced after immersion in the bacterial solution, and their shells were disintegrated because of the presence of Ag. The corrosion potentials of AH32, NiCrAlY, and NiCrAlY(Ag) coated AH32 plates were nearly identical at approximately −720 mV. After being covered with organic paint, the corrosion potential and current density of the NiCrAlY(Ag) coating increased to −624 mV and decreased by one order of 2.75 × 10− 6 A cm−2, respectively. The NiCrAlY(Ag) coating effectively inhibited biological fouling.

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AH32表面ni基涂层的生物结垢及耐腐蚀性能

摘要为了减少船用钢中有机生物结垢的破坏，采用等离子喷涂法在AH32船用钢上制备了含银和不含银的镍基（NiCrAlY）过渡涂层。涂层表现出层状结构，并且检测到AlNi3（111）、（200）和（220）衍射峰。对于Ag掺杂的涂层，也观察到Ag（111）峰。吸附在涂层表面的硫酸盐还原菌（SRB）的数量在浸入细菌溶液后减少，并且由于Ag的存在，它们的外壳被分解。AH32、NiCrAlY和NiCrAlY（Ag）涂层的AH32板的腐蚀电位几乎相同，约为−720 mV。用有机涂料覆盖后，NiCrAlY（Ag）涂层的腐蚀电位和电流密度增加到−624 mV，并降低了2.75的一个数量级 × 10−6 A. cm−2。NiCrAlY（Ag）涂层有效地抑制了生物结垢。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Surface Engineering 工程技术-材料科学：膜

CiteScore

5.60

自引率

14.30%

发文量

审稿时长

2.3 months

期刊介绍： Surface Engineering provides a forum for the publication of refereed material on both the theory and practice of this important enabling technology, embracing science, technology and engineering. Coverage includes design, surface modification technologies and process control, and the characterisation and properties of the final system or component, including quality control and non-destructive examination.