<p>Surface texture could improve wear resistance of materials. In this paper, laser was used to fabricate pit texture on the surface of 304 stainless steel, which commonly used in food machinery. The effects of texture with lower density and wear on the electrochemical corrosion behaviors of 304 stainless steel were investigated in 3.5%NaCl solution. The surface roughness became higher with the increasing of the texture density. Due to treatment of surface texture and wear, the open circuit potential and corrosion potential shifted negatively. The radius of capacitive reactance arc decreased, and the self-corrosion current increased. Texture treatment and wear would respectively lead to preferential corrosion. However, the combined effect of texture treatment and wear decided the corrosion resistance. For samples with 5% texture density, the texture hindered furrows on the surface by wear, while wear reduced the bulges of the texture edge effectively. The preferential corrosion due to texture was weakened by wear. As a result, the radius of capacitive reactance arc was bigger, with lower I<sub>corr</sub> and E<sub>corr</sub> shifting positively. Compared with the worn samples without texture, the wear resistance and corrosion resistance of the samples with 5% texture density could be both improved.</p>

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Corrosion Properties of 304 Stainless Steel in 3.5% NaCl Solution Pre-treated by Low-Density Surface Laser Texture and Dry Sliding Wear

  • Yunwei Cui,
  • Bin Tian,
  • Chunling Meng,
  • Zhiyong Ran,
  • Sijia An

摘要

Surface texture could improve wear resistance of materials. In this paper, laser was used to fabricate pit texture on the surface of 304 stainless steel, which commonly used in food machinery. The effects of texture with lower density and wear on the electrochemical corrosion behaviors of 304 stainless steel were investigated in 3.5%NaCl solution. The surface roughness became higher with the increasing of the texture density. Due to treatment of surface texture and wear, the open circuit potential and corrosion potential shifted negatively. The radius of capacitive reactance arc decreased, and the self-corrosion current increased. Texture treatment and wear would respectively lead to preferential corrosion. However, the combined effect of texture treatment and wear decided the corrosion resistance. For samples with 5% texture density, the texture hindered furrows on the surface by wear, while wear reduced the bulges of the texture edge effectively. The preferential corrosion due to texture was weakened by wear. As a result, the radius of capacitive reactance arc was bigger, with lower Icorr and Ecorr shifting positively. Compared with the worn samples without texture, the wear resistance and corrosion resistance of the samples with 5% texture density could be both improved.