预测镀锌钢户外暴露寿命的加速预测方法

IF 0.8 Q4 ELECTROCHEMISTRY
Ki Tae Kim, Y. Yoo, Y. Kim
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引用次数: 1

摘要

影响大气腐蚀的参数可分为化学因素和物理因素[1-9]。化学因素包括氧气、臭氧、湿气、二氧化硫、盐、灰尘、酸雨、表面夹杂物和其他气体。物理因素主要是温度、风力和阳光。这些因素可能随着季节和自然环境的变化而变化,这些气候变化会影响金属和合金的腐蚀行为。通常,金属和合金的应用环境可分为沿海、工业、城市和农村地区[9-13]。然而,应该注意的是,上述分类被大大简化了。应用环境会对每种金属和合金的寿命产生很大影响,因此寿命的估计需要充分了解并考虑环境[14]。当金属材料在室外使用或暴露时,自然环境会发生降解,如阳光、湿度、雨水、结露和空气中的污染物气体,从而降低耐候性、耐腐蚀性和耐久性。因此,为了测量空气中的特性,最佳方法是室外大气暴露试验[15-18]。室外大气暴露试验评估环境因素(Cl、CO、NOx、SOx、O3),包括天气因素(温度、湿度、太阳辐射量、雪和雨)对室外使用或安装的工业产品(汽车、火车、轮胎、桥梁、道路设施、金属、纺织品、橡胶、天线、电缆等)退化的影响。由于户外暴露试验是提高质量和估计新材料或产品寿命的重要可靠性评估方法之一,因此它被认为是非常重要的。最近,我们小组报告了韩国镀锌钢的大气腐蚀[19,20];当暴露时间增加时,镀锌钢GA表面的Zn含量降低,而铁和氧的含量趋于增加[19]。随着暴露时间的增加,镀锌钢GA试样因氧化锌的形成而变黑,红锈的形成增加了红色。随着镀锌钢GI试样暴露时间的增加,表面开始变黑,但没有形成红锈,颜色也没有明显变化。用加速预测方法预测镀锌钢的户外暴露寿命
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Accelerated Prediction Methodologies to Predict the Outdoor Exposure Lifespan of Galvannealed Steel
Parameters to affect atmospheric corrosion can be divided into chemical and physical factors [1-9]. Chemical factors include oxygen, ozone, moisture, sulfur dioxide, salt, dust, acid rain, inclusion on the surface, and other gases. Physical factors are mainly temperature, wind intensity, and sunlight. These factors may be changeable with seasons and the natural environment, and these climate changes influence the corrosion behavior of metals and alloys. In general, the environments in which the metals and alloys are applied can be classified into coastal, industrial, urban, and rural areas [9-13]. However, it should be noted that the above classification is greatly simplified. The applied environment can have a large effect on the lifespan of every metal and alloy, and thus the estimation of lifespan needs to fully understand and take into account the environment [14]. When metallic materials are used or exposed outdoors, degradation can take place by the natural environment, such as sunlight, humidity, rain, dew condensation, and pollutant gases in the air, and thus weather resistance, corrosion resistance, and durability are lowered. Therefore, in order to measure the properties in the air, the optimum method is the atmospheric outdoor exposure test [15-18]. The atmospheric outdoor exposure test evaluates the effect of the environmental factors (Cl, CO, NOx, SOx, O3) including weather factors (temperature, humidity, quantity of solar radiation, snow, and rain) on the degradation of industrial products (automobile, train, tire, bridge, road facilities, metals, textile, rubber, antenna, cables etc.) that are used or installed at outdoor sites. Because the outdoor exposure test is one of the essential reliability evaluation methods to improve the quality, and estimate the lifespan of new materials or products, it is considered to be very important. Recently, our group reported the atmospheric corrosion of galvanized steels in Korea [19,20]; when the exposure time was increased, the content of Zn from galvannealed steel GA surface decreased while the contents of iron and oxygen tended to increase [19]. With increasing exposure times, the galvannealed steel GA specimen became blackened by the formation of zinc oxide, and red coloration was increased by the formation of red rust. As the exposure time of galvanized steel GI specimen increased, the surface proceeded to blacken, but no red rust was formed and the color did not change significantly. Accelerated Prediction Methodologies to Predict the Outdoor Exposure Lifespan of Galvannealed Steel
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