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1answer
24 views

How well does AA-8000 alloy resist pitting corrosion?

Aluminum corrosion in salty environments often takes the form of a surface pitting -- while this does little to damage the structural value of the aluminium, it can be an issue for mating contexts. ...
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1answer
33 views

AC Coil Corrosion?

I looked at my outdoor AC unit yesterday and it looks like the coils are starting to deteriorate. I looked online and it looks like it's some kind of corrosion. Is this fixable at this point? Or is ...
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3answers
154 views

Are these blue spots on stove coil cups poisonous Verdigris?

I live in the USA and have one of these stoves: For me who comes from Europe, the design of these stove tops always baffles me compared to flat (metal or glass) stove tops seen across Europe (it ...
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3answers
231 views

What nails to use for PT wood?

I'm re-framing my first floor and using PT wood everywhere where there is a possibility of area being flooded. PT wood is your typical 2x4(s) from Home Depot MCA - micronized copper azole ...
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1answer
50 views

How can I treat or replace steel bolts in aluminum nuts to avoid corrosion?

I have a structure originally built from aluminum extrusion with channels using aluminum T-nuts and steel bolts. Over the years, the steel bolts have rusted, making them prone to stripping at the head ...
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3answers
293 views

Rust on copper pipe at strap

I have a few places on 1/2 copper water pipes in my basement that look rusted, right where a strap is. Should I be concerned enough about a leak to replace the line?
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1answer
80 views

Do I need to replace these metal support posts?

I have these 3 permanent lally support posts in the basement: post #1 post #2 post #3 Closeup frame captured from video #1 Recently basement was flooded so I tore down drywall prepping things ...
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votes
1answer
55 views

hot water tank corrosion

I am getting corrosion on my hot water tank connections that looks like electrolysis. I have a water purification system and it has been tested and working properly. I have a lightning protection ...
3
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3answers
266 views

Copper pipe through cinder block wall: corrosion issue

The pipe in the picture runs from my oil tank through my basement wall and to the outside (guessing it's the vent pipe for when they fill the tank). Should I be concerned about what it going on at ...
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1answer
225 views

Can't remove single handle shower handle

I have a Delta Monitor Multichoice 13/14. Removed the hex screw but handle will still not come off. I tried all kinds of twisting and banging on it. Some people suggested rotating the handle past 180 ...
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1answer
292 views

Why does this toilet valve have corrosion on it?

I had a question about some corrosion on my toilet water supply line. I've provided a picture below. What I was wondering are a few things. 1) What is the reason for this? Why would a valve ...
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1answer
173 views

Brass tub overflow pipe stuck in brass tee. How can I remove it?

I am repairing a tub overflow. The screws for the cover plate were very corroded and broke off. I am trying to remove the overflow fitting and pipe but it is stuck. The pipe is brass and slides into a ...
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1answer
61 views

What could cause corrosion in a water heater?

My water heater was replaced about 5 years ago. Recently I discovered some corrosion on some of the pipes and valves connected to the heater. Pictures are attached. I have yet to inspect the anode ...
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1answer
152 views

What could cause a 5 year old valves to corrode so quickly

Unlike this question, the hot water heater is not a factor as it is happening to joints all over the house. Further all joints are either copper on copper or brass on copper. I've taken over ...
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3answers
4k views

Does it matter what kind of pipe is used for a sink drain?

The drainpipe in our sink broke (corroded right through in several places). Not having the time to find my pipe wrench (much less actually replace the pipe) we called a plumber. The plumber replaced ...
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1answer
517 views

Corrosion on copper pipe: Is this a concern?

I came across some corrosion on a copper hot water line in our house: Is this a potential early warning sign of impending pipe failure? I did some research online and came across multiple ...
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1answer
2k views

What could cause my water to taste metallic after a water filter cartridge was changed?

About 20 years ago, we remodeled our home and had two water filters installed (downstairs and upstairs). They are stainless steel enclosures with carbon block filter cartridges inside. The brand is ...
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1answer
89 views

Can hydrochloric acid vapors corrode nearby metal items?

I have a room where I exposed a brick wall and redid the mortar by tuckpointing. It look beautiful but the whitish residue from the mortar needs to be cleaned and the best way to do it is using ...
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2answers
4k views

How should I protect the metal of a power rack that's kept outdoors?

I plan on building a power rack for my home gym and was wondering what kind of metal/coating I should use when building it since it will be stored outdoors. Most commercial power racks are built using ...
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1answer
490 views

Could this corrosion be caused by faulty ground wiring?

What might cause slight corrosion atop a tankless water heater's copper topped element assembly? I checked all the grounding and reconnected the two element assembly grounding wires and ensured ...
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4answers
7k views

Should gloves be worn when working with concrete to prevent it from coming in contact with skin?

I was told recently that concrete is slightly corrosive. Should gloves be worn when using concrete or is it fine to handle concrete as long as its not done on a regular basis?
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1answer
287 views

Under what circumstances can aluminum be in contact with steel?

I understand galvanic corrosion and the chemistry which causes the reaction. But under what circumstances can they be in contact? On first impression I would think they could in a dry environment... ...
5
votes
4answers
21k views

What could be causing my water heater inlet pipe to corrode?

There is corrosion forming on the inlet and TP valve connections to my water heater; the outlet seems to be fine. More specifically, the nipples are what is corroding. I have read the copper pipe ...