Corrosion behavior of 2205 duplex stainless steel
Corrosion behavior of 2205 duplex stainless steel
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DOI：
10.1016/s0889-5406(97)70276-2
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发表时间：
1997-07-01
影响因子：
3
通讯作者：
Moore, BK
中科院分区：
文献类型：
--
作者：
Platt, JA;Guzman, A;Moore, BK
比较了2205双相不锈钢和AISI型316L不锈钢的腐蚀行为。2205不锈钢是具有低镍含量（4至6wt%）的潜在正畸托槽材料，而316L不锈钢（镍含量：10至14wt%）是目前使用的托槽材料。两种不锈钢都在37 ℃、0.9wt%氯化钠溶液中进行电化学和浸入（缝隙）腐蚀试验。电化学测试表明2205比316L具有更长的钝化范围。2205的腐蚀速率为0.416 MPY（毫英寸/年），而316 L的腐蚀速率为0.647 MPY。当2205与316L以相同的表面积比偶联时，2205的腐蚀速率降低到0.260 MPY，表明316L不锈钢表现为牺牲阳极。当316 L与NiTi、TMA或不锈钢弓丝耦合并进行浸泡腐蚀试验时，发现316 L遭受缝隙腐蚀。另一方面，2205不锈钢没有显示出任何局部缝隙腐蚀，尽管2205的表面覆盖有腐蚀产物，其在与NiTi和不锈钢丝耦合时形成。这项研究表明，考虑到耐腐蚀性，2205双相不锈钢是一个改进的替代316 L正畸托槽制造时，与钛，其合金，或不锈钢弓丝。
The corrosion behavior of 2205 duplex stainless steel was compared with that of AISI type 316L stainless steel. The 2205 stainless steel is a potential orthodontic bracket material with low nickel content (4 to 6 wt%), whereas the 316L stainless steel (nickel content: 10 to 14 wt%) is a currently used bracket material. Both stainless steels were subjected to electrochemical and immersion (crevice) corrosion tests in 37 degrees C, 0.9 wt% sodium chloride solution. Electrochemical testing indicates that 2205 has a longer passivation range than 316L. The corrosion rate of 2205 was 0.416 MPY (milli-inch per year), whereas 316L exhibited 0.647 MPY. When 2205 was coupled to 316L with equal surface area ratio, the corrosion rate of 2205 reduced to 0.260 MPY, indicating that 316L stainless steel behaved like a sacrificial anode. When 316L is coupled with NiTi, TMA, or stainless steel arch wire and was subjected to the immersion corrosion test, it was found that 316L suffered from crevice corrosion. On the other hand, 2205 stainless steel did not show any localized crevice corrosion, although the surface of 2205 was covered with corrosion products, formed when coupled to NiTi and stainless steel wires. This study indicates that considering corrosion resistance, 2205 duplex stainless steel is an improved alternative to 316L for orthodontic bracket fabrication when used in conjunction with titanium, its alloys, or stainless steel arch wires.