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rebuilding carbs
exvalvesetdabbler:
Good results are still to come - or not if the yellow passivate on all the carb bits doesn't rub off.
I have a Speedo base to do and hopefully that might use up some of the brightener and dull things down a bit.
Regards
Dave
exvalvesetdabbler:
Hard to see what's going on in there with all the 'bubble bath' they put in these solutions. It got to the top earlier and had to poke it back down with a plastic stick.
I suppose I should just light a couple of stinky candles and relax until they're done.
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Regards
Dave
DomP:
The Gateros kit is really good, its very satisfying when you get good results
exvalvesetdabbler:
Finally got around to doing the yellow passivate the last few days after struggling with adhesion.
A few words of wisdom for anyone using the Gateros kit especially the brightener.
DO NOT DUMP IN THE MAXIMUM AMOUNT OF BRIGHTENER FROM THE START
Initially I was aiming for a satin like finish more in keeping with the original so opted to add 4ml brightener instead of the recommended 6ml. Things were still coming out the bath looking like chrome and the excess brightener film left on the plated items was making the passivate difficult to adhere. So the only thing for it was to do a couple of large items (Speedo bases) to pull some of the brightener out of the bath.(it gets consumed during plating, occluded within the plate and as a surface film).
To succeed with yellow passivate you only need a satin-dull plate coming out of the bath and even that brightens up after passivation.
The key seems to be getting bubble formation in the acid dip before the passivate. With the bright finish and using 5% HCl there were no bubbles at all even after a good minute in the acid, almost like the brightener film was acting as a lacquer.
With much reduced brightener levels in the tank, cleaning off the brightener film becomes easier and bubbles in the pre passivate acid dip make an appearance much quicker. But you still need to wash it off well. I have currently settled on using a warm detergent wash for about 5 minutes in the ultrasonic bath followed by a long soak in a jug of water. Followed up by a quick buzz using a mildly and dilute alkali degreaser.( 10% dilution of Elbow Grease Heavy Duty Degreaser).
Here's what they come out the bath before passivation
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Here's after passivation
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Other than the initial frustration it seems relatively straight forward but very time consuming.
I did feedback these observations to Dan at Gateros. Very helpful chap who looks after his customers.
Regards
Dave
AshimotoK0:
Good tips there Dave and nice results. I have one batch of zinc electrolyte which had depleted brightener so I will try that out.
Yes I always find Dan at Gatetos really helpful unlike the guy at Youplate, who wasn't very helpful at all.
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