CAJ | 학술논문

在直饮水系统环境中使用电化学方法在铜管表面加速沉积了一层碳酸钙水垢，结合计时电流法、扫描电子显微镜（ SEM）和电化学阻抗谱（ EIS）研究了Ca2＋离子浓度、表面粗糙度和沉积时间对水垢沉积速率、成核机理、形貌结构、耐蚀性能的影响。结果表明：Ca2＋浓度越高，沉积速率越快，碳酸钙构型逐渐由方解石变为球文石。表面粗糙度越大，沉积时间越短且晶体的不均匀性增加，抛光处理的铜具有明显的连续成核机制。随着沉积时间的增加，表面逐渐被水垢层完全覆盖，电化学阻抗测试表明铜管的耐蚀性能先下降后上升。
재직음수계통배경중사용전화학방법재동관표면가속침적료일층탄산개수구，결합계시전류법、소묘전자현미경（ SEM）화전화학조항보（ EIS）연구료Ca2＋리자농도、표면조조도화침적시간대수구침적속솔、성핵궤리、형모결구、내식성능적영향。결과표명：Ca2＋농도월고，침적속솔월쾌，탄산개구형축점유방해석변위구문석。표면조조도월대，침적시간월단차정체적불균균성증가，포광처리적동구유명현적련속성핵궤제。수착침적시간적증가，표면축점피수구층완전복개，전화학조항측시표명동관적내식성능선하강후상승。
A layer of calcium carbonate incrustation was deposited on Cu pipe accelerated by electro-chemical method in direct drinking water system environment.Combined with chronoamperometry, scan-ning electron microscope ( SEM ) and electrochemical impedance spectroscopy ( EIS ) , the paper re-searched the effects of Ca2+concentration, surface roughness and deposition time on deposition rate, nu-cleation mechanism, morphology structure and corrosion resistance.The results showed that the higher the Ca2+concentration, the sooner the deposition rate, the structure of calcium carbonate is gradually changed from calcite to vaterite.The deposition time shortened and crystal inhomogeneity increased with the increase of surface roughness.The polished Cu has obvious and progressive nucleation mechanism. The surface is gradually all covered by scale with the increase of deposition time.The electrochemical im-pedance test indicated that the corrosion resistance of Cu pipe decrease first and increase later.