savroc triplehard / tough tri-chrome coatings
DESCRIPTION
Savroc TripleHard tri-chrome coatings resist wear, friction and corrosion. TripleHard coatings are up to three times harder than the existing chromium coatings in the market. That is why TripleHard coatings are an excellent alternative to toxic hex-chrome coatings. See more at: www.savroc.comTRANSCRIPT
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Tough Tri-Chrome Coatings Savroc Ltd
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TripleHard / Optimal Toughness Coatings with customizable mechanical properties
Savroc TripleHard tri-chrome coatings resist wear, friction and corrosion. Mechanical properties are customized to suit each application. For example hardness value can be modified from 1000 HV up to 2500 HV.
0,25 0,14
0,39
SavrocTripleHard 1
SavrocTripleHard 2
Existing HardChromium
Friction [µ]*
0,2 0
0,6
SavrocTripleHard 1
SavrocTripleHard 2
Existing HardChromium
Wear [µm]*
1900 2400
950
SavrocTripleHard 1
SavrocTripleHard 2
Existing HardChromium
Hardness [Hv0,01]
*POD type of test with 6mm Al2O3 ball, m=200g, RPM=300, duration 30 min
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TripleHard Coatings Cut Costs by
LONGER PRODUCT LIFE-CYCLES
LESS WASTEWATER COSTS, SAFER WORKING CONDITIONS
MORE EFFICIENT PRODUCTION PROCESS
Due to maximum performance features
Due to safer trivalent chrome based technology
Due to thinner coatings and less need for grinding
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Chromium (VI) Authorization
On December 21, 2011 ECHA (European Chemicals Agency) recommended chromium trioxide (hexavalent chromium) for entry into Annex XIV REACH
This means that each application of a substance using hexavalent chromium would require its own authorization
Use of a substance for a non-authorized application is restricted after the sunset date, which at the moment for hexavalent chromium is September 2017
Restricts the use of hexavalent chromium
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Case / Corrosion Resistance on Steel
Existing Hard Chromium Nitriding
48 h After
360 h After
456 h After
Savroc TripleHard
48 h After
48 h After
48 h After
Coating thickness 20 µm
AASS, Acetic Acid Salt Spray test according standard ISO 9227
Coating thickness 20 µm
→ Savroc TripleHard coating is significantly more corrosion resistant than existing hard chromium or nitriding based coatings
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Case / Acid Resistance (H2SO4) Savroc TripleHard coating’s acid resistance was compared with two types of hard chrome coatings. The test pieces were dipped into sulphuric acid (H2SO4) 5% in 100 ⁰C temperature. The results show that Savroc TripleHard resists sulphuric acid significantly better than hard chrome.
The edges were protected with varnish
Test duration 22 min Mass loss 0,15 g Corrosion 22 µm
Test duration 2 min Mass loss 0,18 g Corrosion 7 µm
Test duration 23 min Mass loss 0 g
Corrosion 0 µm
Hard Chrome 1 Hard Chrome 2 Savroc
Test Piece
Boiling sulphuric acid (H2SO4) 5 %
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Case / Acid Resistance (HCl) Savroc TripleHard coating’s acid resistance was compared with hard a chrome coating. The test pieces were dipped into hydrochloric acid (HCl) 35 % in 20 ⁰C temperature for 1 hour. The results indicate that Savroc TripleHard resists hydrochloric acid significantly better than hard chrome.
Large microscopic crack 1
Large microscopic crack 2
Results after 1 hour acid dip
Microscopic image (1000x) of test piece surface
-15
-10
-5
0
Large microscopic crack 1
Large microscopic crack 2
Surface Topography
-15
-10
-5
0Surface Topography
HARD CHROME
SAVROC
Microscopic image (1000x) of test piece surface
Dipping time: 1 hour
Large microscopic cracks
Normal microscopic cracks
Test Piece
Hydrocholric acid (HCl) 35 %
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Case / Wear Resistance A POD (Pin On Disk) type of wear test was done with a shaft to compare Savroc’s coatings adhesive wear resistance with three types of hard chrome coatings The test indicated that both Savroc’s coatings resist adhesive wear significantly better than hard chrome
F
RPM
W
Al2O3 Wear
RESULTS
Microscopic image Graph
-9
-8,5
-8
-7,5
-7
Wear depth [µm]
0,8
0,3
-0,2
-0,7
-1,2
0,9 µm
4
2,7 3
0,2
2 1,2
Ovako 280 Happonen +Cr Nikkeli-Kromi Sacroc1122=69/70
Savroc 1109 Savroc 1105
Wear [µm]*
Savroc 1 Savroc 2 Savroc 3 Hard Chrome1
Hard Chrome2
Hard Chrome3
*POD type of test with 6mm Al2O3 ball, m=500g, RPM=300, duration 30 min
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Case / Wear Resistance Sliding wear test* was done to compare Savroc’s TripleHard coating’s (40 µm) sliding wear resistance with a hard chrome coating (80 µm). Results show that Savroc’s coating resists wear better than hard chrome even with a thinner coating surface.
RESULTS
*Sliding wear test with 600 cycles , max. 20 Mpa 0
0,5
1
1,5
2
0 1 3 5 10 15 20
Surface roughness [Ra] / Mpa
Savroc
HardChrome
Coating thickness 80 µm
Hard Chrome Coating thickness 40 µm
Savroc
Ra
Mpa
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Case / Friction Properties A POD (Pin On Disk) type of friction test was done with a shaft to compare Savroc’s coatings friction properties with two types of PVD TiN coatings
→ Both Savroc’s coatings friction properties were better than PVD TiN coatings
→ Smooth coating enables more efficient function of sliding surfaces for example in engine parts, shock absorbers and cutting tools
PVD TiN 2
PVD TiN 1
Savroc 2
Savroc 1
F
RPM
W
Al2O3 µ
*POD type of test with 6mm Al2O3 ball, m=500g, RPM=300, duration 30 min
0
0,1
0,2
0,3
0,4
0,5
0,6
0,7
0,8
Coefficient of Friction [µ]*
PVC DLC
t
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Test Your Application
APPLICATION EXAMPLES
Savroc's piloting service is an easy and low-risk way to ensure Savroc TripleHard coating's suitability for your application
• Hydraulic cylinders • Valves • Pipes • Shock absorbers • Locks • Tools • Taps • Wear parts
LAB TEST Ensuring suitability
of an application
ZERO SERIES Manufacturing a
test series
PRODUCTION SYSTEM Integration of Savroc coating system into a
production line
USER LICENSE License to use Savroc coating
system
PILOTING
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Exclusive Laboratory Facilities Three coating lines The biggest line enables coating of products
with up to 1 m length and 30 cm diameter
Mechanical testing Hardness (MicroVickers) Friction / wear (Pin-On-Disk) Abrasive wear (Taber, Rubber wheel -test) Nanoindentation
Microscopy and surface engineering Atomic Force Microscope (AFM) SEM Scanning electron microscopy Optical microscopy with surface topography
measurement X-ray diffraction for a material structure
analysis
Chemical testing Corrosion testing (Salt spray test) Chemical analysis (Titration and X-ray
analysis)
Simulation and modeling FEM analysis for plating processes Productivity simulation
