全面腐蚀控制
全麵腐蝕控製
전면부식공제
TOTAL CORROSION CONTROL
2015年
2期
50-54
,共5页
湿烟囱%腐蚀%泡沫玻璃砖%胶泥
濕煙囪%腐蝕%泡沫玻璃磚%膠泥
습연창%부식%포말파리전%효니
wet desulfurization chimney%corrosion%foam glass%plaster
采用国产泡沫玻璃砖防腐内衬的火电厂湿烟囱，运行一段时间后，出现严重的渗透腐蚀现象。本文以湿烟囱排烟筒上脱落的泡沫玻璃砖为实验对象，利用EDS和FT-IR分别研究了国产泡沫玻璃砖和有机硅防腐胶泥的腐蚀状况及原理。结果表明，国产泡沫玻璃砖中含有Fe、K、Al、Na、Mg等碱金属，遇酸反应，导致砖体密闭孔隙结构破坏，酥化开裂，失去防腐作用；聚硅氧烷基体的侧基脱落，主链中Si-O-Si刚性结构增多，胶泥失去弹性和粘接性，导致防腐内衬整体脱落。
採用國產泡沫玻璃磚防腐內襯的火電廠濕煙囪，運行一段時間後，齣現嚴重的滲透腐蝕現象。本文以濕煙囪排煙筒上脫落的泡沫玻璃磚為實驗對象，利用EDS和FT-IR分彆研究瞭國產泡沫玻璃磚和有機硅防腐膠泥的腐蝕狀況及原理。結果錶明，國產泡沫玻璃磚中含有Fe、K、Al、Na、Mg等堿金屬，遇痠反應，導緻磚體密閉孔隙結構破壞，酥化開裂，失去防腐作用；聚硅氧烷基體的側基脫落，主鏈中Si-O-Si剛性結構增多，膠泥失去彈性和粘接性，導緻防腐內襯整體脫落。
채용국산포말파리전방부내츤적화전엄습연창，운행일단시간후，출현엄중적삼투부식현상。본문이습연창배연통상탈락적포말파리전위실험대상，이용EDS화FT-IR분별연구료국산포말파리전화유궤규방부효니적부식상황급원리。결과표명，국산포말파리전중함유Fe、K、Al、Na、Mg등감금속，우산반응，도치전체밀폐공극결구파배，소화개렬，실거방부작용；취규양완기체적측기탈락，주련중Si-O-Si강성결구증다，효니실거탄성화점접성，도치방부내츤정체탈락。
Etching solution leaked from the thermal power plant wet chimney, which adopted domestic foam glass anti-corrosion lining and worked for a period of time. The performance of the foam glass anti-corrosion lining of it was studied in this paper. The properties of the foam glasses and plaster picking from the chimney lining were characterized by EDS and FT-IR. The results showed that the alkali metals (including Fe, K, Al, Na, Mg and so on) in the domestic foam glasses reacted with the acid corrosive media of the wet gas, which gave rise to the destruction of the closed pore structure and crisp cracking of the bricks; meanwhile, pendant groups on the polysiloxane matrix shed and Si-O-Si rigid structure increased in the main chain, which result in the loss of elasticity and adhesion of the plaster, then the foam dlass anti-corrosion lining fell off.
