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Injectors... possibly improving them?

Pepperidge

Pepperidge

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Slidell, La
Injectors...I was just reading about a coating process "Nickel Boron" a coating that is virtually indestructible. It has a Rockwell hardness of 78-82.

Wondering if we could start with injector tips bored over the thickness of the actual coating process or larger for 20 or 40 over injectors...then coat the injector tips through the nozzle bore and such...maybe preventing this premature wear...

thoughts?
 
What is the coating process? What about wear resistance, I would think with the high pressures that the injectors run at, it should be a consideration. I wouldn't want something that hard being blown off and flying into the cylinder.
 
I was told today that the main wear points are the seat and the needle where they slam shut each cycle that sure would be easier to coat than the inside the holes/tips of the nozzles...I'd love to have one taken apart if anyone has one...I would gladly do the legwork to see if we could improve the life of them...
 
has nothing to do with heat...

the coating isn't a heat protection...it is a hardness protection...Hard Chromed steel and titanium nitride coated steel(as in those gold looking drill bits) are both very durable and act as a lubricant...Nickel Boron is even harder and more wear resistant and therefor has even better protective properties against wear...
 
Pepperidge said:
has nothing to do with heat...

the coating isn't a heat protection...it is a hardness protection...Hard Chromed steel and titanium nitride coated steel(as in those gold looking drill bits) are both very durable and act as a lubricant...Nickel Boron is even harder and more wear resistant and therefor has even better protective properties against wear...
Click to expand...
I don't think that's what he meant. In the link I put up, it says that the coating is good up to 1000 degrees. I think what he is saying is that inside the injector will never see that. But the outside will see flashes of high temps.
 
Nickel-boron Baths
Nickel-boron baths are usually formulated using an amine borane as the chemical reducing agent. Alloy deposits can be plated from acid as well as alkaline baths and are harder, as plated, than nickel-phosphorus deposits. In addition, the melting point of nickel-boron alloys is higher.
Nickel-boron systems are most often used in electronic applications to provide specific deposit properties. They are sometimes used in industrial wear applications because of their high hardness levels. The chemical cost of these systems can range from five to 10 times that of nickel-phosphorus baths.
Low-boron-containing baths (less than one pct B) produce deposits having high electrical conductivity, good solderability and good ultrasonic bonding characteristics. Baths formulated to produce higher levels of boron (2 to 3 pct) in the deposit have very high hardness values as plated and tend to retard the formation of oxides on the surface of the deposit.
Sodium borohydride is sometimes used as the chemical reducing agent in nickel-boron systems. These baths codeposit higher levels of boron (5 to 6 pct), but are less stable than amine borane baths because of the high pH values required to prevent hydrolysis and solution decomposition.



Melting Temperature
The melting temperatures of electroless nickel deposits vary widely, depending upon the amount of phosphorus alloyed in the deposit. A generally accepted melting point is about 1616°F (880°C) for deposits from processes with approximately 7 to 9 pct phosphorus. This temperature corresponds to the melting point of nickel phosphide (NiP[SIZE=-2]3[/SIZE]), which precipitates during heating of electroless nickel deposits.
 
Interesting

Neat, this sounds great Pepp. Are you going to buy new and or rebuilt injectors and then have them coated with nickle boron. Your the ginea pig. But if this is the solution, why didn't GM or Bosch come up with it. No money to be made if it worked?! You would be solving a lot of peoples problem if this was to come to past. I don't have the injector problem yet, but its coming. So keep up the great work and let us know.
 
I would think that the small size of the hole it would not be possible to get the coating to apply evenly and smoothly enough. The injector tip hole size is ~.0061" and the seat area that wears out most times is the return seat and it ~ .010"
 
Will

Where there's are a will, there's a way. But would it be cost effective? What about making the holes larger then coating it.
 
Pepperidge said:
Injectors...I was just reading about a coating process "Nickel Boron" a coating that is virtually indestructible. It has a Rockwell hardness of 78-82.

Wondering if we could start with injector tips bored over the thickness of the actual coating process or larger for 20 or 40 over injectors...then coat the injector tips through the nozzle bore and such...maybe preventing this premature wear...

thoughts?
Click to expand...

Dura-Ration said:
Where there's are a will, there's a way. But would it be cost effective? What about making the holes larger then coating it.
Click to expand...

thats what I say...I've seen this stuff in finished form...I still think it will work..
 
Dura-Ration said:
Neat, this sounds great Pepp. Are you going to buy new and or rebuilt injectors and then have them coated with nickle boron. Your the ginea pig. But if this is the solution, why didn't GM or Bosch come up with it. No money to be made if it worked?! You would be solving a lot of peoples problem if this was to come to past. I don't have the injector problem yet, but its coming. So keep up the great work and let us know.
Click to expand...

if there was a fix gm would have done it, they are losing much more than they are making replacing these things as much as they do. good luck pepp. you might just have something here. any luck with the truck?
 
Just check with the people who do the coating and ask them if they can coat hole in this size range. The hole could be opened up to allow for the coating but I doubt it still will work. Most plating processes do not work in small holes, but you never know without asking.
 
stacks04 said:
if there was a fix gm would have done it, they are losing much more than they are making replacing these things as much as they do. good luck pepp. you might just have something here. any luck with the truck?
Click to expand...

HaHaHa....pass the koolaid.....
 
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