表面技术
錶麵技術
표면기술
Surface Technology
2015年
9期
102-107,115
,共7页
王甜甜%马士越%吴坤坤%王博%李谦定
王甜甜%馬士越%吳坤坤%王博%李謙定
왕첨첨%마사월%오곤곤%왕박%리겸정
曼尼希碱%SO2-4%PO3-4%极化曲线%缓蚀性能
曼尼希堿%SO2-4%PO3-4%極化麯線%緩蝕性能
만니희감%SO2-4%PO3-4%겁화곡선%완식성능
Mannich base%SO2-4%PO3-4%polarization curve%corrosion inhibition performance
目的：研究废酸液中介质离子对曼尼希碱酸化缓蚀剂缓蚀性能的影响,以解决碳钢在酸液中的腐蚀问题。方法采用静态失重法、极化曲线、扫描电镜及能谱分析法,研究SO2-4,PO3-4对曼尼希碱型酸化缓蚀剂缓蚀性能的影响,并探究其作用机理。结果在10%(质量分数)盐酸、0.1%(质量分数)曼尼希碱的缓蚀介质中,随SO2-4质量分数的增大,腐蚀电流密度由2.81μA/cm2增加至7.32μA/cm2,腐蚀速率显著增大,缓蚀效果变弱；随PO3-4质量分数的增加,腐蚀电流密度由2.81μA/cm2减小至2.41μA/cm2,腐蚀速率减小,缓蚀效果变强。结论 SO2-4会通过钢铁表面已经形成的吸附膜上的细孔和缺陷渗入膜内,使膜发生开裂,从而侵蚀和破坏已经形成的吸附膜,抑制缓蚀剂的缓蚀效果；PO3-4与腐蚀产物Fe3+络合并在钢材表面形成一层致密的保护层,使缓蚀剂形成的吸附膜更加致密,阻止腐蚀性介质与金属表面接触,同时增加对离子或溶解氧的扩散阻力,提高缓蚀剂的缓蚀效果。
目的：研究廢痠液中介質離子對曼尼希堿痠化緩蝕劑緩蝕性能的影響,以解決碳鋼在痠液中的腐蝕問題。方法採用靜態失重法、極化麯線、掃描電鏡及能譜分析法,研究SO2-4,PO3-4對曼尼希堿型痠化緩蝕劑緩蝕性能的影響,併探究其作用機理。結果在10%(質量分數)鹽痠、0.1%(質量分數)曼尼希堿的緩蝕介質中,隨SO2-4質量分數的增大,腐蝕電流密度由2.81μA/cm2增加至7.32μA/cm2,腐蝕速率顯著增大,緩蝕效果變弱；隨PO3-4質量分數的增加,腐蝕電流密度由2.81μA/cm2減小至2.41μA/cm2,腐蝕速率減小,緩蝕效果變彊。結論 SO2-4會通過鋼鐵錶麵已經形成的吸附膜上的細孔和缺陷滲入膜內,使膜髮生開裂,從而侵蝕和破壞已經形成的吸附膜,抑製緩蝕劑的緩蝕效果；PO3-4與腐蝕產物Fe3+絡閤併在鋼材錶麵形成一層緻密的保護層,使緩蝕劑形成的吸附膜更加緻密,阻止腐蝕性介質與金屬錶麵接觸,同時增加對離子或溶解氧的擴散阻力,提高緩蝕劑的緩蝕效果。
목적：연구폐산액중개질리자대만니희감산화완식제완식성능적영향,이해결탄강재산액중적부식문제。방법채용정태실중법、겁화곡선、소묘전경급능보분석법,연구SO2-4,PO3-4대만니희감형산화완식제완식성능적영향,병탐구기작용궤리。결과재10%(질량분수)염산、0.1%(질량분수)만니희감적완식개질중,수SO2-4질량분수적증대,부식전류밀도유2.81μA/cm2증가지7.32μA/cm2,부식속솔현저증대,완식효과변약；수PO3-4질량분수적증가,부식전류밀도유2.81μA/cm2감소지2.41μA/cm2,부식속솔감소,완식효과변강。결론 SO2-4회통과강철표면이경형성적흡부막상적세공화결함삼입막내,사막발생개렬,종이침식화파배이경형성적흡부막,억제완식제적완식효과；PO3-4여부식산물Fe3+락합병재강재표면형성일층치밀적보호층,사완식제형성적흡부막경가치밀,조지부식성개질여금속표면접촉,동시증가대리자혹용해양적확산조력,제고완식제적완식효과。
Objective To explore the effects of SO2-4 and PO3-4 on the performance of mannich base hydrochloric acid corrosion inhibitor. Methods Using static weight-loss method, polarization curve, scanning electron microscope and energy spectrum analy-sis, the effects of SO2-4 and PO3-4 on the performance of mannich base hydrochloric acid corrosion inhibitor were studied and its mechanism was explored. Results In corrosion medium with 10%HCl and 0. 1% mannich base, with the increase of SO2-4 mass fraction, the corrosion current density increased from 2. 81μA/cm2 to 7. 32μA/cm2 , the corrosion rate significantly increased and the corrosion inhibition effect was weakened;on the contrary, with the increase of PO3-4 mass fraction, the corrosion current density decreased from 2. 81 μA/cm2 to 2. 41 μA/cm2 , the corrosion rate decreased and the corrosion inhibition effect was strengthened. Conclusion SO2-4 penetrated into the steel surface adsorption film through the holes and defects, forming cracks in the film, leading to erosion and damage of the adsorption film, and the effect of mannich acid hydrochloric acid corrosion inhibitor was suppressed. The corrosion products of PO3-4 and Fe3+ formed a layer of dense membrane on the steel surface, making the adsorption film formed by the corrosion inhibitor more dense, leading to difficulty in the contact of corrosive medium and metal surface, meanwhile, the diffusion resistance of ions or dissolved oxygen was increased, and the performance of mannich base hydrochloric acid corrosion in-hibitor was promoted.
