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Geo

Today I noticed during a long??daytime scan,the temperature at the back on the extreme left was rising about 8 degrees celsius??near the USB port.

Elsewhere it is usually less than 3 or 4 degrees max

But the temperature on system is normal on the display screen?

Ok let’s get back to automotive xrf

Next item is used disc brakes

The xrf elements detected is impressive.

Metals detected are Titanium,iron,copper ,zirconium and barium .Barium and??graphite? ??form the pads.

Taray

On Sunday, December 6, 2020, 11:27 PM, GEOelectronics@... wrote:

Thanks for the longer scan Taray, but please don't hesitate to post? shorter scans with lower peak heights like you did yesterday.

This is good practice and a source of discussion.

Basically that's how I learned, then improved all aspects of amateur scanning with whatever equipment I owned at the time.? Now I think my scans deserve the long time frames of days time, but this only in the last few weeks.

Geo

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From: "taray singh via groups.io" <sukhjez@...>
To: [email protected]
Sent: Saturday, December 5, 2020 10:59:12 PM
Subject: Re: [XRF] Xrf timing belt

Dude

Yes I was expecting that ha ha

Could have done a longer scan but I was running out of time yesterday.

I acquired a cartoon of my car disposable parts goodies??late yesterday.

They consist of used brake pads ,fan belt??plus tensioner and the timing belt assembly.

The timing belt components are belt and multiple pulleys.Changing timing belt means replacing the the whole assembly .

After noting the xrf results,I was doing some investigative xrf of the other components??to explain my findings.

The metal??pulleys???also had iron and zinc.

Also checked out sometimes zinc is added to the oil used to lubricate certain timing belt systems.

Initially thought there was some contamination from nearby structures.

But this was ruled out

Car mechanics is very confusing too me especially when it comes to tensioners and lubricant oils on the timing belt.

Preliminary impression was the zinc and iron could have rubbed??off on the??old timing belt and got impregnated as silly as it may sound.

After I took a closer look at the timing belt ,the pieces of the puzzle started to fit.

I have some other??parts to xrf next time like the used???belt pulleys,brake pads??and tensioners which are very metallic indeed.

Here is longer scan of the timing belt

Taray

On Sunday, December 6, 2020, 6:26 AM, Dude <dfemer@...> wrote:

You ID’d only the very strongest peak and at only 7 total counts some would argue that is insufficient to make a claim considering close ?overlap and confirming with secondary peaks . What about the more subtle peaks that are going to take a much longer time to develop? Use longer count times and find out what you’re missing or not.

Dud

?

?

From: [email protected] [mailto:[email protected]] On Behalf Of taray singh via groups.io
Sent: Saturday, December 5, 2020 7:30 AM
To: [email protected]
Subject: [XRF] Xrf timing belt

?

HI guys
Before doing this xrf .I knew little about timing belts and how they actually function.
I thought made of just plain rubber or something like that until my car timing belt almost snapped on the freeway weeks ago.
Replaced a new one together with the full timing belt kit.
Kept the old stuff for xrf.
Xrf was pretty short because? the peaks were appearing and therefore I decided no need for a longer scan.
Xrf with Am 241 show iron and zinc peaks.
On further reading noted that these belts are made of rubber reinforced with fibreglass,steel or neoprene.
Most likely the iron is in the cords and zinc as neoprene in the rubber
Pics are for a section of the timing belt exposing the cords and mca .
Thanks
Taray