alumina/titania chromia/titania - VeMet

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• Chalk formation observed of ceramic coating andon stainless steel parts,• No chalk formation on concrete and steel parts,• Caused by:Galvanic corrosion between the nobleintermediate layer and the steel parts of thecylinder.• Solution:- Change in design and material selection. (notpossible)- Isolating the rod from the less noble parts. 8x ø200xL=10.000mmDepth: 40 mtrs under waterGabicikovo project Donau
• Dissolving of Alumina outof Alumina/Titania coating• Caused by:- Attack of the Alumina bywater Glycol hydraulicfluid.(pH>9,5)7x ø190xL=16.000mm3x ø300xL=16.000mm• Solution:Change type of coating intoChromia/Titania
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 and 16: • Porosity is determined usinga p
Page 17 and 18: Coating Code Thickness Process Subs
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: • Under corrosion in the bottom z
Page 37 and 38: • Blistering due to under corrosi

alumina/titania chromia/titania - VeMet

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