Hi guys
Automotive xrf continues?
Here is an xrf of??my used car spark plug
The elements detected are as follows?
Main body Fe
Likely to have an Aluminum oxide ceramic??
Electrode side?
Ni as a super alloy electrode?
Zn chromate shell plating??providing the color.
Other elements which may be??present??at the electrode end but??not detected due to trace amounts or spectral overlay are silver, gold??or platinum?
Pics are??for spark plug,Mca and corresponding pic
Thanks?
Taray
On Monday, December 7, 2020, 12:44 PM, Dude <dfemer@...> wrote:
Well I stretched my
imagination but I¡¯m not convinced there¡¯s any Zn.? Try a used oil. I may be the
levels are too low to pull out
dud
?
?
Dude
I did an xrf scan on my
red transmission oil.
Sampling was repacking
on??a thin kitchen plastic .
Recently learned that
these engine oils??have a color coding system
Various additives such as
P ,Ca,Mg,Zn in ppm doses .
P is usually the highest followed
by Zn in new oil.
But old oil with wear and
tear several other metals get added such as Al,Cr,Fe ,Cu ,Ag and Sn sometimes
as metal chips in old engines .P drops in old oil but it is not measurable here
anyway.
The scan was hesitantly
stopped cos I noticed some??potential heating issues
on my detector?
I need to improve my
ventilation to promote heat loss .
?I don¡¯t think this
transmission oil is gonna ignite when in contact with 59 keV gamma rays.
Anyway the scan results
are rather flat?
But if stretch our
imagination a bit ,there could be Zn peak?
I guess a used oil will
probably reveal better results??.
In my attempt to take a
snapshot of the oil,I spilled some on the floor and on??my pants.Dealing with oils
is a messy job for some?
Taray
?
On Monday,
December 7, 2020, 3:03 AM, GEOelectronics@... wrote:
PS on the thermal, it is
OK to put a small fan nearby to help cool the body.?
Later we will work on a
simple heatsink for the case.......Fins are good, not much heat to transfrer to
air about 1 Watt
From: "taray singh via
groups.io" <sukhjez@...>
To: [email protected]
Sent: Sunday, December 6, 2020
10:14:34 AM
Subject: Re: [XRF] Xrf timing belt
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.
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
?
?
?
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
?
?
