Active Oxide Polishing Suspensions - Vivid Technologies

Active OxidePolishing SuspensionsOxide Polishing Suspensions forYour Final Polishing Needs• Perfect surface finish• Fast and economical• Regular and NonDryformulations

Improve Your Polishing ResultsBoost polishing efficiency and ensure deformation-free results with Struers’ complete line of activeoxide polishing suspensions developed to meet your unique requirements for a perfect surfacefinish – fast.Duplex stainless steel, etched electrolytically using 40% aqueoussodium hydroxide solution. Differential Interference Contrast, 100x.Final polishingA perfect surface finish is a requirementin most materialographic specimenpreparations. The requirements to purity,cleanliness, equal distribution of alloyingelements and phases are increasinglyimportant in today’s world of high-techproducts and complex materials.A perfect surface cannot be achieved bymechanical abrasion alone, as some levelof deformation will always be created.Sole chemical material removal producesrelief between various phases.Perfect surface finishStruers' oxide polishing suspensionscombine chemical activity with fine,gentle abrasion to produce an absolutelyscratch-free and deformation-free surface.The abrasives and chemical reagents havebeen carefully selected to produce thenecessary surface quality for specimenexamination.Fast and economicalThe active oxide suspensions reactchemically with the surface of thespecimen, building a reaction layerwhich is relatively brittle. The brittlelayer is removed by the very smallabrasive particles in the suspension. Thismechanism is repeated continuously,resulting in a very high removal rate.2

No drying up in dosing tubesWith Struers' NonDry suspensions youcan be sure to minimize the risk ofunexpected interruptions due to driedup suspension.Test: Struers OP-S/OP-U NonDry vs. competitive noncrystallizing suspensionAfter 1 weekYour polishing processes can stop andstart without having to flush dosing tubesor clean dosing bottles every time.Furthermore, the NonDry formulationremains in a liquid format – reducing therisk of damaging crystals embedded inyour polishing cloths.Tests have shown that standardformulations dry out very fast, butalso competitors’ non-crystallizingsuspensions evaporate and are completelydry in less than one week. Struers NonDrysuspensions remain liquid and evenlydistributed even after one week.Struers regular OP-S.Struers OP-U NonDry.Struers OP-S NonDry.Competitor 1, regular oxide susp.Competitor 1, non crystallizing oxide susp.Competitor 2, non crystallizing oxide susp.Active oxidepolishing providesthe best possiblesurface finish• OP-S NonDry/OP-S for veryductile metals• OP-U NonDry/OP-U forheterogeneous non-ferrousmetals or composites• OP-AA for high and low alloysteels, nickel-base alloys andceramics• OP-AN for all materials3

OP-S NonDry/OP-SOP-S NonDry/OP-S is especially suited for polishing of very ductile metals like refractorymetals, aluminium, titanium*, tungsten, copper and other materials such as silicon. It canalso be used with the addition of reagents, normally used for the etching of the material inquestion. This increases the chemical activity, thus shortening the actual polishing time.*For the preparation of titanium we recommend using regular OP-S.ZnCuTi alloy.Polarized Lightwith sensitivetint plate, 200x.Method 1Method 2Plane Grinding Fine Grinding Diamond Polishing Diamond Polishing Oxide PolishingSurface MD-Gekko MD-Plan MD-Dac MD-Mol MD-ChemAbrasive SiC # 220 DP-Suspension, P - 9 µm DP-Suspension, P - 6 µm DP-Suspension, P - 1 µm OP-S NonDry/OP-ULubricant Water DP-Lubricant, Blue DP-Lubricant, Blue DP-Lubricant, Red -Surface MD-Piano 220 MD-Plan - MD-Mol MD-ChemAbrasive Diamond DiaPro Plan - DiaPro Mol OP-S NonDryLubricant Water - - - -OP-U NonDry/OP-UOP-U NonDry/OP-U is less aggressive than OP-S NonDry and suitable for all materials. Bestresults can be achieved with heterogeneous non-ferrous materials and composites. Differentphases are evenly polished, resulting in samples with a very good planeness.Austemperedductile iron,Pol. Light,etched with 3 %Nital, 200x.Method 1Plane Grinding Fine Grinding Diamond Polishing Diamond Polishing Oxide PolishingSurface MD-Gekko MD-Largo MD-Dur MD-Mol MD-ChemAbrasive SiC # 320 DP-Suspension, P - 9 µm DP-Suspension, P - 6 µm DP-Suspension, P - 3 µm OP-U NonDry/OP-ULubricant Water DP-Lubricant, Blue DP-Lubricant, Blue DP-Lubricant, Red -Method 2 Surface MD-Fuga MD-Largo MD-Dac MD-Nap MD-ChemAbrasive SiC # 320 DiaPro Allegro/Largo DiaPro Dac DiaPro Nap-R OP-U NonDryLubricant Water - - - -OP-AAOP-AA is especially suited for the final polishing of ferrous metals, Ni-base alloys andceramics. OP-AA has an outstanding stability. The suspension can even be mixed with anadditional acid to increase chemical activity without interference with the stability.High alloyedchromiumsteel, mag.Brightfield,etched withBeraha II, 200x.Method 1Plane Grinding Fine Grinding Diamond Polishing Diamond Polishing Oxide PolishingSurface MD-Gekko MD-Plan MD-Dur MD-Dur MD-ChemAbrasive SiC # 120 DP-Suspension, P - 9 µm DP-Suspension, P - 3 µm DP-Suspension, P - 1 µm OP-AALubricant Water DP-Lubricant, Blue DP-Lubricant, Blue DP-Lubricant, Blue -Method 2 Surface MD-Piano 220 MD-Allegro MD-Dac - MD-ChemAbrasive Diamond DiaPro Allegro/Largo DiaPro Dac - OP-AALubricant Water - - - -OP-ANOP-AN can be used for all materials. It is an all-round oxide suspension with the possibility ofmixing additives to obtain chemical activity. OP-AN can be customised to polish all materialse.g. use an acidic solution to lower the pH or an alkaline solution to raise the pH. The suspensioncan even be mixed with an additional acid to increase chemical activity without interferencewith the stability.Cu58Zn42,Brightfield,etched withKlemm III, 50x.Method 1Plane Grinding Fine Grinding Diamond Polishing Diamond Polishing Oxide PolishingSurface MD-Gekko MD-Largo MD-Dur MD-Mol MD-ChemAbrasive SiC # 320 DP-Suspension, P - 9 µm DP-Suspension, P - 6 µm DP-Suspension, P - 3 µm OP-ANLubricant Water DP-Lubricant, Blue DP-Lubricant, Blue DP-Lubricant, Red -Method 2 Surface MD-Primo 220 MD-Largo - MD-Dur MD-ChemAbrasive SiC DiaPro Allegro/Largo - DiaPro Dur OP-ANLubricant Water - - - -Polishing cloths for oxide polishingDepending on the materials to be polished, different polishing cloths are used. MD- or DP-Nap is mostly used for softer materials with normaloxide polishing suspension whereas MD- or OP-Chem is better suited for harder materials, and for polishing with active oxide polishing suspension.4

Overview OP-S NonDry/OP-S OP-U NonDry/OP-U OP-AA OP-ANPurposeFor very ductile materials likerefractory metals and othernon-ferrous metals. Ceramics.For heterogeneous materials likecomposites Carbon- and low alloysteels.For high alloy steels and nickelbased alloys.For all materials.Abrasive Colloidal silica Colloidal silica Aluminium oxide Aluminium oxideGrain size 0.04 µm 0.04 µm 0.02 µm 0.02 µmConcentration Ready to use Ready to use Ready to use Ready to usepH Alkaline (pH: 9.8) Alkaline (pH: 9.8) Acidic (pH: 3 – 3.5) Neutral (pH: 7 – 7.5)Addition of additivesYese.g. acid (acetic acid), alkaline(potassium hydroxide), oxidation(hydrogen peroxide) and lubricating(glycerine).Use an acidic solution to increasechemical activity.NoIn general no, but hydrogen peroxideand ammonia can be added in limitedquantities.Yese.g. acid (acetic acid, oxalic acid),oxidation (hydrogen peroxide) andlubricating (glycerine).Use an acidic solution to increasechemical activity.Yese.g. acid (acetic acid, oxalic acid),alkaline (potassium hydroxide),oxidation (hydrogen peroxide) andlubricating (glycerine).Use an acidic solution for lowering pHand use alkaline solution to raise pH.The viscosity will increase in alkalinesuspensions.SpecificationsCat.noOP-S NonDryNon-drying colloidal silica suspension for final polishing. Ready to use.Suitable for mixing with chemical reagents for polishing of resistant materials.1 l. 407000645 l. 40700065OP-SColloidal silica suspension for final polishing. Ready to use.Suitable for mixing with chemical reagents for polishing of resistant materials.1 l. 407000005 l. 40700001OP-U NonDryNon-drying colloidal silica suspension for final polishing of all materials. Ready to use.1 l. 407000665 l. 40700067OP-UColloidal silica suspension for final polishing of all materials. Ready to use.1 l. 407000025 l. 40700003OP-AAAcidic alumina suspension for final polishing of high and low alloy steels, nickel-base alloysand ceramics. Ready to use. Suitable for mixing with acid to increase chemical activity. 750 ml. 40700052OP-ANNeutral alumina suspension for final polishing of all materials. Ready to use.Suitable for mixing with chemical reagents to increase chemical activity. 750 ml. 40700054SpecificationsCat.noPolishing cloth, ø 200 mm. Package of 5 pcs.MD-Nap, metal backed 40500080DP-Nap, adhesive backed 40500232MD-Chem, metal backed 40500092OP-Chem, adhesive backed 40500308Polishing cloth, ø 250 mm. Package of 5 pcs.MD-Nap, metal backed 40500081DP-Nap, adhesive backed 40500233MD-Chem, metal backed 40500093OP-Chem, adhesive backed 40500309Polishing cloth, ø 300 mm. Package of 5 pcs.MD-Nap, metal backed 40500082DP-Nap, adhesive backed 40500233MD-Chem, metal backed 40500094OP-Chem, adhesive backed 40500310Polishing cloth, ø 350 mm. Package of 5 pcs.MD-Nap, metal backed 40500153MD-Chem, metal backed 40500154MD-Rondo. Package of 5 pcs.Adapter disc for application of self-adhesiveconsumables to MD-Disc.ø 200 mm 40503000ø 250 mm 40503001ø 300 mm 40503002ø 350 mm 40503082Struers’ products are subject to constant product development. Therefore, we reserve the right to introduce changes in ourproducts without notice.4 5