面向未来的腐蚀控制.pdf

1、Future Proofing Corrosion ControlM i c h e l l e B au e r,S c i e n t i s tSeptember 2025AGENDAFuture Proofing Corrosion Control1Inorganic Corrosion Inhibitors23NEWNEW HIE Organic CI Application Data4NEWNEW BOP Organic CI Application Data5Organic Corrosion InhibitorsCorrosion Formation and Inhibitio

2、nSummary6Corrosion Formation&InhibitionCorrosion Cell Diagram4Traditional Corrosion InhibitionInorganic Metallic SaltsMechanisms:Mechanisms:Anodic PassivationMigrate and react at the anode to form salts that act as a protectivebarrier.Adsorb at anodic sites,preventing dissolution of metal in acidic

3、media.PrecipitationProtective film-forming compounds.Block anodic and cathodic reactions by precipitating onto surface of metalPO-OO-O-FePO4(pore plug)Anodic InhibitorCoating6Mixed Metal Cation Phosphates Passivation MechanismPhosphatePhosphateKspKspLi3PO42.4x10-4CaHPO41.0 x10-7MgNH4PO42.5x10-13AlPO

4、41.3x10-20FePO41.3x10-22Mg3PO46.3x10-24Ba3(PO4)21.3x10-29Ca3(PO4)22.0 x10-29Sr3(PO4)21.0 x10-31Zn3(PO4)29.0 x10-33CePO42.9x10-34Why Use Organic Corrosion Inhibitors?Provide multiple inhibitive mechanisms Good solubility Low particle size minimal gloss impact Liquid and powder options Low use levels

5、maintain cost of use Adhesion promotion Adsorb on surfaces(physisorption or chemisorption)Physisorption(electrostatic interaction b/n charged metalsurface and charged inhibitor)Chemisorption(transfer or share of unbounded electrons b/nmolecule and metal surface)Act synergistically with inorganic cor

6、rosion inhibitorsMechanisms of Organic Corrosion Inhibitors8Interfacial ActivityImprove coating wetadhesionAnodic ActivityFormation of insolublecomplex salts atanodic defect sitesBarrier PropertiesReduce porosity&permeability incoatingAdsorption ActivityProtective layerformationAdhesion viamechanica