恐龙化石的人工加速腐蚀研究

邓建国;刘东亮;叶勇

doi:10.13718/j.cnki.xsxb.2014.07.010

西南师范大学学报(自然科学版)

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恐龙化石的人工加速腐蚀研究

邓建国;刘东亮;叶勇. 恐龙化石的人工加速腐蚀研究[J]. 西南师范大学学报(自然科学版), 2014, 39(7). doi: 10.13718/j.cnki.xsxb.2014.07.010

引用本文:

邓建国;刘东亮;叶勇. 恐龙化石的人工加速腐蚀研究[J]. 西南师范大学学报(自然科学版), 2014, 39(7). doi: 10.13718/j.cnki.xsxb.2014.07.010

DENG Jian-guo , LIU Dong-liang , YE Yong. On Artificial Accelerated Corrosion of Dinosaur Fossils[J]. Journal of Southwest China Normal University(Natural Science Edition), 2014, 39(7). doi: 10.13718/j.cnki.xsxb.2014.07.010

Citation:

DENG Jian-guo , LIU Dong-liang , YE Yong. On Artificial Accelerated Corrosion of Dinosaur Fossils[J]. Journal of Southwest China Normal University(Natural Science Edition), 2014, 39(7). doi: 10.13718/j.cnki.xsxb.2014.07.010

恐龙化石的人工加速腐蚀研究

邓建国;刘东亮;叶勇

四川理工学院,四川自贡643000; 腐蚀与防护四川省重点实验室,四川自贡643000;自贡恐龙博物馆,四川自贡,643013

On Artificial Accelerated Corrosion of Dinosaur Fossils

DENG Jian-guo , LIU Dong-liang , YE Yong

摘要: 为了深入探讨恐龙化石的风化原因，为恐龙化石新型保护材料的研制提供理论支持，项目采用0.5，1，2 mol/L硫酸溶液，二氧化碳饱和液与5％碳酸氢钠溶液对自贡出土恐龙化石进行人工加速腐蚀实验；利用失重法、XRD、XRF和显微法表征．结果表明：3种介质对化石腐蚀速率依次为硫酸溶液24.2136 g/（m2· h ），二氧化碳0.6637 g/（m2· h），碳酸氢钠0.1263 g/（m2· h）．硫酸溶液对化石腐蚀速率是二氧化碳的36.5倍，是碳酸氢钠溶液的191.7倍；在0.5 mol/L硫酸溶液腐蚀下，XRD和XRF说明化石中CaCO3首先腐蚀，腐蚀量最大，腐蚀后化石中钙含量减少66.4％．化石腐蚀前后形貌变化与腐蚀速率一致．
- 恐龙化石 /
- 腐蚀介质 /
- 腐蚀
Abstract: To understand the mechanism of dinosaur fossils'weathering ,the corrosion of the dinosaur fos-sils unearthed in Zigong have been investigated in this paper .Its artificial acceleration corrosion were in-vestigated in 0 .5 mol/L ,1 mol/L ,2 mol/L sulfuric acid solution ,saturated carbon dioxide solution and 5% sodium hydrogen carbonate solution ,respectively .Conducted in the fossils corroded have been charac-terized by XRD ,XRF and microscopic method . T he results show that the corrosion rates of the fossils these three media are 24 .213 6 g/(m2 · h) for sulfuric acid solution ,0 .6637g/(m2 · h) for carbon dioxide and 0 .126 3 g/(m2 · h) for sodium hydrogen carbonate .The corrosion rate in sulfuric acid solution is 36 .5 and 191 .7 times as great as those of carbon dioxide and sodium hydrogen carbonate ,respectively .In the case of 0 .5 mol/L sulfuric acid solution ,the results from XRD and XRF demonstrate that CaCO 3 in fossils is corroded firstly .The corrosion degree of CaCO3 is very large .The calcium content is reduced by 66 .4%after corrosion .The morphology change of fossils uncorroded and corroded is consistent with the corrosion rates .
- dinosaur fossil，corrosion inhibition，corrosion /

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恐龙化石的人工加速腐蚀研究

邓建国;刘东亮;叶勇

四川理工学院,四川自贡643000; 腐蚀与防护四川省重点实验室,四川自贡643000;自贡恐龙博物馆,四川自贡,643013

关键词:

恐龙化石 /
腐蚀介质 /
腐蚀

摘要: 为了深入探讨恐龙化石的风化原因，为恐龙化石新型保护材料的研制提供理论支持，项目采用0.5，1，2 mol/L硫酸溶液，二氧化碳饱和液与5％碳酸氢钠溶液对自贡出土恐龙化石进行人工加速腐蚀实验；利用失重法、XRD、XRF和显微法表征．结果表明：3种介质对化石腐蚀速率依次为硫酸溶液24.2136 g/（m2· h ），二氧化碳0.6637 g/（m2· h），碳酸氢钠0.1263 g/（m2· h）．硫酸溶液对化石腐蚀速率是二氧化碳的36.5倍，是碳酸氢钠溶液的191.7倍；在0.5 mol/L硫酸溶液腐蚀下，XRD和XRF说明化石中CaCO3首先腐蚀，腐蚀量最大，腐蚀后化石中钙含量减少66.4％．化石腐蚀前后形貌变化与腐蚀速率一致．

English Abstract

On Artificial Accelerated Corrosion of Dinosaur Fossils

四川理工学院,四川自贡643000; 腐蚀与防护四川省重点实验室,四川自贡643000;自贡恐龙博物馆,四川自贡,643013

Keywords:

恐龙化石 /
腐蚀介质 /
腐蚀

Abstract: To understand the mechanism of dinosaur fossils'weathering ,the corrosion of the dinosaur fos-sils unearthed in Zigong have been investigated in this paper .Its artificial acceleration corrosion were in-vestigated in 0 .5 mol/L ,1 mol/L ,2 mol/L sulfuric acid solution ,saturated carbon dioxide solution and 5% sodium hydrogen carbonate solution ,respectively .Conducted in the fossils corroded have been charac-terized by XRD ,XRF and microscopic method . T he results show that the corrosion rates of the fossils these three media are 24 .213 6 g/(m2 · h) for sulfuric acid solution ,0 .6637g/(m2 · h) for carbon dioxide and 0 .126 3 g/(m2 · h) for sodium hydrogen carbonate .The corrosion rate in sulfuric acid solution is 36 .5 and 191 .7 times as great as those of carbon dioxide and sodium hydrogen carbonate ,respectively .In the case of 0 .5 mol/L sulfuric acid solution ,the results from XRD and XRF demonstrate that CaCO 3 in fossils is corroded firstly .The corrosion degree of CaCO3 is very large .The calcium content is reduced by 66 .4%after corrosion .The morphology change of fossils uncorroded and corroded is consistent with the corrosion rates .