摘要
选择普通玻璃鳞片涂料、耐高温玻璃钢衬里两种防腐蚀材料制作混凝土试块,同时与无保护的混凝土试块一起在脱硫系统烟气区进行现场腐蚀试验,试验周期为3个月、6个月。对试验后防腐蚀层外观、混凝土中钢筋的腐蚀形貌以及混凝土中氯元素等进行分析。结果表明,无保护混凝土试块,外界腐蚀介质已渗透到混凝土内部,导致钢筋出现非常明显的腐蚀;普通玻璃鳞片涂料出现小鼓泡并有高温烧蚀现象,可以一定程度上阻止腐蚀介质的渗透,对钢筋起到一定程度的保护;耐高温玻璃钢衬里本身较稳定,没有鼓泡烧蚀,能够较好地阻止腐蚀介质的渗透,对钢筋起到保护作用。
The corrosion behavior of concrete and anticorrosion coatings in flue gas region of desulphurization system was studied by field testing for 3 months and 6 months. The test specimens included unprotected concrete and concrete block with glass flake coating or high temperature resistance glass fiber reinforced plastic lining. The outward appearance, corrosion morphology of rebar in concrete specimens and Cl- content in concrete specimens were studied. The results show that Cl- can permeate into the unprotected concrete specimens, and thus cause marked corrosion of rebar in concrete specimens. Glass flake coating has some small blister and can provide some extent protection to the rebar in concrete specimen. High temperature resistance glass fiber reinforced plastic lining has very good corrosion resistance and can give an ideal protection to the rebar in concrete specimens.
出处
《腐蚀与防护》
CAS
北大核心
2011年第7期567-569,共3页
Corrosion & Protection
关键词
脱硫
烟气
混凝土
腐蚀试验
desulphurization
flue gas
concrete
corrosion test
