Questions tagged [galvanic-corrosion]
The galvanic-corrosion tag has no usage guidance.
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Main Water Line coming into House leaking/rusted out - How to replace and with what?
We just purchased a home in Joshua Tree, CA and the main water line coming into the house after the exterior shut off valve is leaking a lot. The concrete over part of it came off and I am able to see ...
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How to prevent GI pipe from getting corroded
I have a hollow GI pipe.
I recently got the top end welded but top end is corroding along with that I think GI pipe is also corroding.
I'm think I should unweld the cap and paint the inside of GI by ...
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Dielectric question
I'm replumbing a home, and I have a quick question of when/where to use a dielectric fitting. The water main is coming through a bedroom, outside the interior wall. Starts galvanized from floor and ...
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How should I attach sacrificial anodes to steel columns in concrete?
Soldier pile retaining wall.
We're putting 25 foot long w8x48 beams into 16 foot deep holes and filling with concrete.
So the steel beam is encased in concrete.
I would like to increase their ...
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Will stainless bolts rust more or less than zinc plated when installed in cast iron?
Scenario:
I have a 3-seasons ocean side cottage which sources its water from a shallow well via a convertible jet pump with a cast-iron casing/housing.
I winterize the water system each fall and the ...
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Are galvanized or stainless machine screws OK to use with field-tapped holes in aluminum castings (outdoors, wet)?
I'm installing some weatherproof cast aluminum junction boxes outdoors (full rain/sun exposure) for a GEC run, and would like to drill/tap additional holes in them to mount brackets etc. Do I need to ...
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How can I deal with galvanic corrosion on my water heater?
My water heater is 4 1/2 years old. Looks live galvanic corrosion. Can I get by without replacing the whole heater? Maybe just the pipes and fittings?
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Will Stainless Steel Screws with Galvanized Hinges Cause Corrosion? (Exterior Application, Near Ocean)
I have a set of galvanized hinges for a shed door. The shed is located 50 feet from the ocean. Very salty air.
The hinges didn't come with screws and I'm having a hard time finding suitable galvanized ...
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Reverse Osmosis (RO) water leeching galvanized pipe
Recently I installed a whole house reverse osmosis (RO) system. It was working great for a couple of weeks, unfortunately I didn't do all my research about RO and its affects on metal pipes.
Recently ...
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Joining galvanized gutter sections: Rivet, solder, spotweld, or another method?
I will be replacing a section of gutter on a barn in a month and was wondering what the best method of joining the sections is. I will have limited ergonomics working in a lift about 27 ft off the ...
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Dealing with build up from galvanic corrosion in supply tees
I opened up the wall behind my kitchen sink during a major remodel to find iron nipples in threaded brass fittings. Here is an image with labels:
I removed the iron nipples from both cold water ...
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How to remove this galvenized pipe?
I'm attempting to replace the pipes between the bathroom sink ptrap till the end of the pipe that leads to the basement as you can see depicted in the photo. I was able to remove the ptrap as well as ...
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Will this plumbing setup result in galvanic corrosion?
When I moved in two years ago, the plumbing in this area showed significant corrosion. There was no galvanic isolation between the steel pipes leading to the upstairs bath, and the copper piping in ...
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Is a mix of copper and galvanized pipe a problem if dielectric unions are used where they meet?
Over decades, my house has accrued a mix of galvanized, copper, and pex pipe. I've been told that one "should stick to one type of metal in your pipes or use pex." (here)
As long as ...
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What is causing these water heater pipes to rust/corrode?
This water heater was replaced by a plumber 4-5 years ago. Within about a year, all the new connections were rusting/corroding.
Did the plumber not sufficiently tighten the fittings?
Is this perhaps ...
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What's this white crust in my kitchen pipe threads?
I had to change the kitchen sink P-trap (J pipe and tailpiece) and there's hard white crusty stuff in the threads that's making it difficult to screw on the new ring nut connectors. The old parts had ...
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Under what circumstances is galvanic corrosion a concern in electrical work?
I'm curious why contact between dissimilar metals in electrical work is seems to only be a problem in some cases. For example, one must use antioxidant when joining aluminum and copper wiring in ...
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Is there a test to determine if a nail is galvanized or not?
I bought a nailer which came with some old nails that I'm going to use for a shed floor into pressure treated wood.
As you can see, they kinda look galvanized. They have that grey patina. But other ...
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Galvanized steel hinge screws with stainless steel hinges: What is the risk of galvanic corrosion?
The screws in question are zinc-plated hardened steel screws (1 1/4 in) for use with heavy duty fire-rated stainless steel interior door hinges of unspecified grade.
There is a theoretical risk of ...
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Should this section of water line be replaced?
This is the water supply line coming into my basement. 4 feet below the ground (frost line). My house is from 1940 and I assume that everything in these pictures are original.
I recently converted ...
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Hillman "Deck Plus" lag screws
I'm re-planking my deck and shoring up some of the substructure while I'm in there. The beams are side-mounted to the posts like this (from dca 6):
This is obviously non-ideal, but is impractical to ...
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How can I diagnose galvanic corrosion on a water pipe?
I have a newly installed indirect hot water heater and two of the pipes are showing significant amounts of corrosion.
Given that the installation is only 3 months old, I suspect that there may be ...
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How can I treat and prevent rust in steel wire rope?
After 8 years of questions, I finally completed the fence. The issue I’m having now is that the loops in the steel are rusting at a pretty fast rate.
I’m looking to spray them with something that will ...
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galvanized or stainless turnbuckles for exterior wire rope fence?
I'm working on a wire rope fence that looks like this. The difference is that we live fairly close to the ocean, which means lots of salty air.
I've bought 1/8" galvanized steel with plastic coating ...
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galvanic corrosion with anchor point on galvalume roofing
I'm going to add some sort of anchor point, for attaching a safety rope, to my galvalume roof (some sort of shoulder eye bolt, but that is a different discussion). My question, what metal is best ...
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Can I convert galvanized ducts to wood stove black ducts by coating it with high temp RustOleum paint?
I compared the black ducting for wood stoves with regular galvanized ducting and found that they are both 24 gauge and I noticed they are both steel since both tug magnets. There is quite a large ...
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Water heater inlet corrosion after 4 years? Installer claims they did everything right
Similar to this question, I've got severe corrosion on my 4 year old water heater inlet. I was having the heater flushed when this was discovered, and the person flushing it said it was caused by the ...
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Any way to see if it's made of galvanized steel?
Is there any easy way for me to see if something is made from regular steel or galvanized steel?
I'm having some galvanized steel bases installed at my apartment, but I want to make sure it's actual ...
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Is galvanized steel totally incompatible with cedar, even when only touching on the surface?
I'm building a cedar picket fence attached to 2 3/8" chain link fence style galvanized steel posts using galvanized post brackets like these. I know that there are a lot of material incompatibility ...
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