Corrosion Resistance of Sensitized 430 Stainless Steel in Food Simulation Solution
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摘要: 430不锈钢试样在进行不同程度的敏化后，在5%（质量分数，下同）NaCl溶液、4%（体积分数，下同）乙酸溶液、5%NaCl+4%乙酸混合溶液等3种食物模拟溶液中进行电化学试验，研究了敏化度、浸泡时间和溶液温度对试样耐腐蚀性能的影响。结果表明：在NaCl溶液中，试样的自腐蚀电位随敏化度的增大正移，随浸泡时间的延长先负移后正移；在乙酸溶液和NaCl+乙酸混合溶液中，自腐蚀电位随敏化度的增大或浸泡时间的延长均负移，且在NaCl+乙酸混合溶液中的负移幅度均很小；随着溶液温度的升高，试样在3种溶液中的自腐蚀电流密度和腐蚀速率均增大。Abstract: Electrochemical tests in three food simulation solutions, including 5wt% NaCl solution, 4vol% acetic acid solution and 5wt% NaCl+4vol% acetic acid solution, were conducted on 430 stainless steel specimens after sensitization to different degrees. Effects of sensitization degree, soaking time and solution temperature on corrosion resistance of specimens were studied. The results show that in the NaCl solution, the free corrosion potential of samples shifted positively with increasing sensitization degree while shifted negatively and then positively with increasing soaking time. In acetic acid solution and NaCl+acetic acid mixed solution, the free corrosion potential shifted negatively with increasing sensitization degree or soaking time, and the shift range in NaCl+acetic acid mixed solution was very narrow. With increasing solution temperature, the free corrosion current density and corrorion rate of specimens in three solutions increased.
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[1] 张卫国, 黄秋婵, 韦友欢. 浅谈不锈钢餐具与人体健康[J]. 微量元素与健康研究, 2008, 25(5):60-61. [2] 食品安全国家标准食品接触用金属材料及制品:GB 4806.9-2016[S]. [3] FLINT G N, PACKIRISAMY S. Purity of food cooked in stainless steel utensils[J]. Food Additives and Contaminants, 1997, 14(2):115-126.
[4] 温军国, 郑弃非, 涂思京, 等. 热处理对铁素体不锈钢组织和性能的影响[J]. 稀有金属, 2006, 30(增刊1):152-154. [5] 万章. 铁素体不锈钢晶间腐蚀问题的探讨[J]. 石油化工腐蚀与防护, 2015, 32(4):62-64. [6] 庞晋山, 曾勚, 彭晓俊,等. 三种不锈钢在食品接触模拟溶液中的耐蚀性能及重金属迁移行为[J]. 机械工程材料, 2013, 37(5):62-65. [7] 邵泽斌,陈海涛,朗宇平,等. 430铁素体不锈钢晶间腐蚀敏感性评测方法及影响因素[J]. 特殊钢, 2012, 33(5):57-60. [8] 郝文魁,刘智勇,黄天杰,等.不同敏化温度和冷凝液成分对430铁素体不锈钢电化学腐蚀行为影响[J]. 机械工程材料,2015,39(4):58-65. [9] 解琼,史培阳,姜茂发.铁素体不锈钢在盐酸溶液中的腐蚀过程[J]. 东北大学学报(自然科学版),2015,36(1):38-43. [10] 解琼,史培阳,刘承军,等. 铁素体不锈钢在盐酸基溶液中的加速腐蚀行为研究[J]. 钢铁钒钛, 2015,36(4):114-118. [11] 李春杰. 盐酸腐蚀低碳钢的动力学研究[J].大庆石油学院学报, 1999,23(3):28-30.
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