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Test Results

Corrosion Resistance

The salt spray testing is currently ongoing, the latest information shows one tiny speck of corrosion after 5000 hours of continuous testing.

FORD APGE cyclic corrosion test (FLTM B1 123-01) : 80 cycles no effect on panels, 40 cycles is considered pass ( as of 06/05/2011) test continuing.

 

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Wear Resistance

Various tests have been carried out to establish the resilience of ceramic anodising: Tabor Abrasive Wear (40,000 cycles with no wear or weight loss), Abrasive paper, Grit Blasting, Filing, Impact resistance.

Abrasive Paper

Grit Blasting

Here are two examples of parts that have been grit blasted with 120 Grit Aluminium Oxide at 100psi. The blasting nozzle was passed over the parts 10 times at a distance of 6”.

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Filing

6061T3 aluminium ring subjected to over a dozen series of tests. Each test consisted of securing the ring in a lathe and run at high RPM as a steel Mill Bastard file was forced against the surface. Each test was run until black marks, evident in the photo appeared. The black specks visible are the teeth from the file. After the first test it was not uncommon to see sparks appearing as the file was pressed against the ring. The sparks were from steel on steel contact between the file and the specks of teeth from previous tests. The teeth can be removed from the ring by running a piece of sandpaper against the ring while it is spun on the lathe.

Impact Test ( Gravelometer: 5A)

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Specific Applications For Diamondyze

One area where the advantages of Diamondyzed parts have been proven, is arguably one of the toughest environments for aluminium components. Internal engine parts such as pistons have been tested, giving improved engine performance. Note the slight wear on the bottom of the piston in the image below.

Test performed by Bud Yancer, M.A.C.H., Maricopa, A.Z.

  1. The test engine was assembled with all Diamondyzed pistons and then put through two days of dyno testing. No special machining was performed.

The three primary objectives were :-

1: To determine the ability of Diamondyze on the skirt to resist galling and provide reduced friction.

2: To reduce ring galling, improve seal and eliminate any sticking of the rings, allowing them to move freely.

3: To act as a thermal barrier, reducing hotspots, shedding carbon, maintaining combustion temperatures longer during the power stroke and reducing piston temperature.

Procedure:- The test engine was run with varying the timing, jetting and load. All three goals were met and exceeded.

The results :-

20 more H.P.

30 more ft/lbs of torque

No ring sticking, and the rings looked like they had not even been run.

Leak down was 0.0% to 1.0%.

Minimal carbon retention and the carbon present simply wiped off
No evidence of galling or wear at all. The pistons, other than the slight carbon present and mild colour changes at the top, looked like they had not been run.

The cylinder walls and cross hatch actually looked better than when The engine would not detonate. The spark plugs showed no distress using hot plugs.

  1. The second engine had Diamondyzed pistons on one side only. The test was performed with the same procedures. The objectives were the same.

The results :-

H.P. showed slight improvement at peak only, as the torque curve was not as good.

Torque was similar but fluctuated with a loss at higher RPM.

The non Diamondyzed piston showed evidence of ring sticking and wear.

The leak down on the non Diamondyzed pistons reached 3.0% while the Diamondyzed pistons was less than 1.0%.

The non Diamondyzed pistons showed more carbon retention to the piston and the exhaust port.

Non Diamondyzed pistons showed wear and scuff lines with material transfer between the piston and cylinder present. This did not occur to the Diamondyzed pistons.

The cylinder walls showed no wear with the Diamondyzed pistons, the non diamondyzed side showed wear especially at BDC, where the cross hatch was removed, with similar wear at TDC.

Detonation was experienced on the non diamondyzed side.

Top ring tension was reduced on the non diamondyzed side.

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