Authors: Zhu, Liqun; Wang, Feng; Watanabe, Tohru

Source: Transactions of the Institute of Metal Finishing, Volume 83, Number 5, October 2005 , pp. 258-261(4)

Publisher: Maney Publishing

Abstract:

12·5Cr–21·0Ni stainless steel was chemically treated with zinc phosphate in order to find the most suitable phosphate solution and its operating parameters. The phosphate coatings were tested for their corrosion protection of stainless steel using three methods: the salt spray test, the humidity cabinet test and the brine immersion test. The phosphate coatings were also mechanically tested using a tensile test for determining their mechanical properties. Results clearly show that phosphate coatings with a uniform appearance and full coverage can give high corrosion protection to 12·5Cr–21·0Ni stainless steel by forming a physical barrier against the corrosive environment. The 12·5Cr–21·0Ni stainless steel after coating with zinc phosphate still retains reliable mechanical properties, thereby providing valuable applications in the engineering field.

Keywords: ZINC; CORROSION PROTECTION; PHOSPHATE COATING; MECHANICAL PROPERTY; 12.5CR-21.0NI STAINLESS STEEL

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/002029605X70441

Publication date: 2005-10-01

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