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中国腐蚀与防护学报  2017, Vol. 37 Issue (2): 101-109    DOI: 10.11902/1005.4537.2016.202
  研究报告 本期目录 | 过刊浏览 |
超深冲压用冷轧板在模拟海洋大气环境中的腐蚀行为
毛成亮1,肖葵1,2(),董超芳1,2,吴俊升1,2,颜利丹1,蒋立1
1 北京科技大学腐蚀与防护中心 北京 100083
2 北京科技大学 腐蚀与防护教育部重点实验室 北京 100083
Corrosion Behavior of Extra Deep Drawing Cold Rolled Sheet in Stimulative Ocean-atmosphere Environment
Chengliang MAO1,Kui XIAO1,2(),Chaofang DONG1,2,Junsheng WU1,2,Lidan YAN1,Li JIANG1
1 Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China
2 Key Laboratory for Corrosion and Protection (MOE), University of Science and Technology Beijing, Beijing 100083, China
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摘要: 

根据万宁海洋大气试验站近3 a的大气环境数据,采用当量折算法,计算中性盐雾实验模拟万宁海洋大气环境所需的折算周期。以超深冲压冷轧板DC06和Q235钢为实验材料,研究二者在中性盐雾实验中的腐蚀行为,并通过灰色关联度法,定量研究中性盐雾加速实验和万宁海洋大气户外暴露实验的相关性。结果表明：DC06和Q235钢中性盐雾实验腐蚀动力学曲线拟合后均符合幂函数规律;DC06和Q235钢经计算周期 (528 ha-1) 和常用周期 (480 ha-1) 中性盐雾实验与万宁户外大气暴露实验的灰色关联度均大于0.6,符合室内外动力学一致性原则;DC06和Q235钢两种材料在折算周期 (528 ha-1) 下的灰色关联度 (0.6761,0.7383) 大于常用周期 (0.6029,0.6050)。
关键词 ： 超深冲压冷轧板,  DC06,  当量折算,  加速实验,  灰色关联度    
Abstract：

The conversion period for the corrosion data of steels acquired respectively by the outerdoor exposure test and the indoor neutral salt spray test, which aims to simulate the corrosivity of the marine atmospheric environment at Wanning, was calculated by means of the equivalent conversion method, while taking the real marine atmospheric environmental data over the past three years at Wanning area into account. Then the corrosion behavior of an extra deep drawing cold rolled sheet DC06 and a carbon steel Q235 was comparatively studied through neutral salt spray test for desired conversion periods. In the meanwhile, the correlation between the results of the indoor neutral salt spray accelerated test and the outdoor air exposure test at Wanning is quantitatively studied by the grey correlation degree method. The results show that the corrosion kinetics curves of DC06 and Q235 by neutral salt spray test are in accordance with the power function law. For DC06 and Q235, their relevant results of neutral salt spray test for the conversion period (528 ha-1) and the common period (480 ha-1) respectively showed gray correlation degrees greater than 0.6 with those of the outdoor atmospheric exposure test at Wanning,indicating that the corrosion dynamics results measured indoor and outdoor respectively are of consistency. It is noted that the grey correlation degrees for the outdoor test results with those of indoor test for the conver sion period are higher than those for the common period.
Key words： extra deep drawing cold rolled sheet    DC06    equivalent conversion    accelerated test    rey relational degree
收稿日期: 2016-10-14     
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毛成亮
肖葵
董超芳
吴俊升
颜利丹
蒋立

引用本文:

毛成亮,肖葵,董超芳,吴俊升,颜利丹,蒋立. 超深冲压用冷轧板在模拟海洋大气环境中的腐蚀行为[J]. 中国腐蚀与防护学报, 2017, 37(2): 101-109.
Chengliang MAO, Kui XIAO, Chaofang DONG, Junsheng WU, Lidan YAN, Li JIANG. Corrosion Behavior of Extra Deep Drawing Cold Rolled Sheet in Stimulative Ocean-atmosphere Environment. Journal of Chinese Society for Corrosion and protection, 2017, 37(2): 101-109.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2016.202      或      https://www.jcscp.org/CN/Y2017/V37/I2/101

Material RH / % Temperature / ℃
20 25 30 35
Steel 70 0.13862 0.02049 0.24066 0.34024
80 0.12590 0.14173 0.44544 0.59702
90 0.08226 0.32299 0.57282 1.00000
表1  潮湿空气与标准潮湿空气的折算系数
Material Concentration / of NaCl α
Steel 0.5% 0.485
1.7% 0.417
3.5% 0.320
7.0% 0.310
表2  不同浓度NaCl与水介质的折算系数
Year Temperature / ℃ Precipitation / h Fog / h Humidity / h
RH=70% RH=80% RH=90%
2012 20 162.8 170.5 --- 1217.7 1099.7
25 146.4 167.4 --- 2482.1 545.4
30 82.5 20.3 --- 1545.5 ---
2013 20 65.7 98.1 528.5 601.4 639.4
25 233.2 204.1 --- 1531.3 1448.5
30 68.8 79.5 --- 1491.1 ---
2014 20 90.3 119.6 --- 1171.2 538.6
25 168.7 149.5 --- 1998.3 1045.1
30 89.8 20.9 --- 1542.5 ---
表3  万宁实验站降雨、雾及温湿度累积谱
Steel C S Mn Si Ti P Fe
Q235 0.1900 0.0042 0.39 0.26 --- 0.0076 Bal.
DC06 0.0053 0.0045 0.22 --- 0.12 0.0190 Bal.
表4  Q235和 DC06钢主要化学成分
图1  Q235和DC06钢不同时间中性盐雾实验后腐蚀失重曲线
Steel A n R2
Q235 1.59262 0.94827 0.97407
DC06 2.86327 0.88896 0.99060
表5  拟合曲线参数
图2  Q235钢不同周期盐雾实验后腐蚀微观形貌
图3  DC06钢经不同周期盐雾实验后腐蚀微观形貌
图4  Q235和DC06钢不同时间中性盐雾实验后的XRD谱
图5  Q235和DC06钢不同时间中性盐雾实验后的极化曲线
Test 0.5 a (264 h) 1 a (528 h) 1.5 a (792 h) 2 a (1056 h) 2.5 a (1320 h) 3 a (1584 h)
Exposure x0 371.43 571.12 743.56 878.17 1008.62 1129.47
x2 336.30 566.64 768.87 954.76 1129.37 1295.50
Accelerated x1 414.98 629.88 869.99 1099.47 1367.46 1828.38
x3 439.77 825.00 1000.70 1365.57 1679.35 2049.41
表6  Q235和DC06钢室内外实验腐蚀失重统计表 (528 ha-1)
Test 0.5 a (240 h) 1 a (480 h) 1.5 a (720 h) 2 a (960 h) 2.5 a (1200 h) 3 a (1440 h)
Exposure x0 371.43 571.12 743.56 878.17 1008.62 1129.47
x2 336.30 566.64 768.87 954.76 1129.37 1295.50
Accelerated x1 259.10 550.42 751.79 1023.04 1175.93 1577.78
x3 313.94 616.87 940.65 1243.32 1786.95 1952.61
表7  Q235和DC06钢室内外实验腐蚀失重统计表 (480 ha-1)
Test 0.5 a (264 h) 1 a (528 h) 1.5 a (792 h) 2 a (1056 h) 2.5 a (1320 h) 3 a (1584 h)
Exposure Y0 1.0000 1.5376 2.0019 2.3643 2.7155 3.0409
Y2 1.0000 1.6849 2.2863 2.8390 3.3582 3.8522
Accelerated Y1 1.0000 1.5179 2.0965 2.6495 3.2952 4.4059
Y3 1.0000 1.8760 2.2755 3.1052 3.8187 4.6602
表8  Q235和DC06钢室内外实验腐蚀失重预处理结果 (528 ha-1)
Test 0.5 a (240 h) 1 a (480 h) 1.5 a (720 h) 2 a (960 h) 2.5 a (1200 h) 3 a (1440 h)
Exposure Y0 1.0000 1.5376 2.0019 2.3643 2.7155 3.0409
Y2 1.0000 1.6849 2.2863 2.8390 3.3582 3.8522
Accelerated Y1 1.0000 2.1244 2.9015 3.9484 4.5385 6.0895
Y3 1.0000 1.9649 2.9963 3.9604 5.6920 6.2197
表9  Q235和DC06钢室内外实验腐蚀失重预处理结果 (480 ha-1)
Steel Time 0.5 a (264 h) 1 a (528 h) 1.5 a (792 h) 2 a (1056 h) 2.5 a (1320 h) 3 a (1584 h)
Q235 △01 0 0.1977 0.0946 0.2852 0.5797 1.3651
DC06 △02 0 0.1911 0.0108 0.2662 0.4605 0.8080
表10  Q235和DC06钢室内外实验腐蚀失重的绝对差 (528 ha-1)
Steel Time 0.5 a (240 h) 1 a (480 h) 1.5 a (720 h) 2 a (960 h) 2.5 a (1200 h) 3 a (1440 h)
Q235 △01 0 0.5867 0.8997 1.5841 1.8230 3.0485
DC06 △02 0 0.2800 0.7100 1.1214 2.3338 2.3675
表11  Q235和DC06钢室内外实验原始腐蚀数据 (480 ha-1)
Cycle time γ
Q235 steel (528 ha-1) 0.7383
DC06 steel (528 ha-1) 0.6761
Q235 steel (480 ha-1) 0.6050
DC06 steel (480 ha-1) 0.6029
表12  室内外实验的灰关联度
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