https://doi.org/10.1016/j.cesx.2021.100096
“The cylinders were weighed both after rinsing with water and after 24 h soaking in 0.1 M H2SO4, so that the cylinder mass loss could be used to assess corrosivity in addition to ICP-MS data. The absolute mass losses during the experimental period are very low (<0.05% at most). This is due to the relative total mass of the cylinders of about 170 g. A mass loss due to corrosion in <5 weeks is therefore relatively small, but still a statistically significant difference could be observed between the different salt solutions. Fig. 9 shows that the lowest cylinder mass losses are seen in those that contained 30 %wt. MEA with 2.0 %wt. KI, while the highest losses are in those containing 7.5 %wt. NaCl, despite the statistical significance of these measurements being low. According to this test, all solutions seem to induce the same degree of cylinder destruction as salt-free MEA, something that confirms the ICP-MS results. Since this method is sensitive to corrosion-unrelated causes of cylinder loss, such as chipping, it is not a perfect indication of corrosion and shows a relatively high uncertainty.”
“Fig. 9. Loss of mass of stainless-steel cylinders during the thermal degradation experiments with 30 wt% MEA (aq.), as well as a set of end-sample cylinders containing only deionized water. Error bars represent the standard error of the two cylinders used for each time of sampling for each solution. The total cylinder mass without solution is 170 g.”