Failure simulation experiments of multiple thermal fluid recovery sand control screen were firstly carried out in erosion, corrosion and erosion-corrosion superposition conditions. The experiments were carried out in high temperature and high pressure reaction still. The corrosion rates of screen block sand medium were respectively observed in three conditions by weight loss method, the corrosion rate of 434 material in superposition condition is 75 times higher than that in erosion condition and is 53% higher than that in corrosion condition. Macroscopic and microscopic analysis were carried out by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). Results showed that corrosion rates in superposition conditions were observably higher than those in single erosion and single corrosion conditions. The destructive effect of corrosion to organism and erosion to corrosion protective film promote mutually, which leads to the increase of damage degree.
LI Xiaobo
,
ZHANG Hailong
. Erosion and Corrosion Superposition Mechanism of Thermal Screen[J]. Science & Technology Review, 2014
, 32(3)
: 49
-55
.
DOI: 10.3981/j.issn.1000-7857.2014.03.007
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