alumina/titania chromia/titania - VeMet

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• Current is impressed in orderto enhance corrosion rate,• Potential is measured duringgalvanostatic polarization,• Galvanostatic level wasobtained from thepolarization curve and achosen factor 10x of thecorrosion current, or thelargest factor possibleavoiding passive layer breakthrough,• At failure of coating potentialwill decrease to substratelevel,• At success of coatingpotential will remain atcoating level.
Coating Code Thickness Process SubstrateHard chromium G1 50um Galvanic C-steelHard chromium G2 60/40um Galvanic C-steelAlumina/Titania P1 300um Plasma C-steelChromia/Titania P2 300um Plasma C-steelNiCr composite H1 200um HP-HVOF C-steelWc-Hastelloy H2 200um HP-HVOF C-steel
Page 2: • Wear in general has a yearly lo
Page 5 and 6: Coating Process B.C. T.C. Service E
Page 7 and 8: DRY ABRASION TESTWET PARTICLE ABRAS
Page 9 and 10: • Contact force: Actual cylinder
Page 11 and 12: Mpa80Bondstrength according to ASTM
Page 13 and 14: • Tested samples Alumina/Titania
Page 15: • Porosity is determined usinga p
Page 19 and 20: Hard chromium (G1) has anOCP of -34
Page 21 and 22: Mineral oil and water glycolfluids
Page 23 and 24: • Different surface profiles with
Page 25 and 26: • Profile is function of way of m
Page 27 and 28: Electro polymerization (monomer > p
Page 29 and 30: • Current:Directly effects temper
Page 31 and 32: Electrochemical Potential[V] vs. sa
Page 33 and 34: • Under corrosion in the bottom z
Page 35 and 36: • Dissolving of Alumina outof Alu
Page 37 and 38: • Blistering due to under corrosi

alumina/titania chromia/titania - VeMet

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