Questions tagged [corrosion]
For questions about the process of corrosion or protection of metals from corrosion.
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Combining Lead pipe with Zinc or Copper pipes in a domestic water installation
Grateful if someone assists in explaining this example that appears on a high school text book. The problem can be summarized as follows:
"Old water networks supply water to a residential area ...
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What is this white layer on brass?
I have an object made of what I assume to be brass, i.e. an alloy of copper and zinc.
The curved parts have both a black layer and a white layer (also note the verdigris (I guess) on the left top, but ...
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Can acetic or citric acid be too highly concentrated when used for cleaning copper?
I intend to clean a copper surface with acetic or alternatively citric acid. There are many different concentrations recommended by different sources on the internet. For example vinegar with 10% acid ...
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Why is RO water more corrosive?
According to several articles from the American Water Works Association, permeate from RO should be stabilized in terms of pH and hardness to avoid corrosion of the distribution piping.
How does ...
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Copper vs Stainless Steel - which is more resistant to corrosion? [closed]
I keep reading conflicting information on this.
For normal water with a normal ph balance, over time which more resistant to corrosion - copper or stainless steel?
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Rusting in every other bar
I have noticed that, when a structure with bars (such as a gate or a grate) develops rust, this sometimes happens differently across the bars. In particular, it seems that the bars are alternatively ...
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Why is aluminum oxide resistant to corrosion?
It is common knowledge that aluminum is relatively resistant to corrosion due to its tough oxide layer. The ultrathin (1 nm even) layer is impervious to water and oxygen. What I can't figure out is, ...
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What (stored-as-solids) acids/liquids can clean corroded copper?
I'm looking for a liquid that can remove copper corrosion (oxides and basic carbonates - the black and green stuff) off copper piping.
The corrosion will be located on the inside of the pipe, in hard-...
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6463-T6 aluminum oxidation and role of water and ethanol vapor
Our issue...in a nutshell: We use 6463-T6 aluminum as a sampling "cell" for analysis of water and ethanol vapor mixtures in both wet and dry gas variations. As I understand it, the ...
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How does copper rich "weld thru" primer protect iron / steel?
In the automotive industry, to protect steel which cannot be painted (e.g. the gap or seam between two sheet panels), a product known as weld thru primer is sometimes used.
This is a coating of zinc-...
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Are all corrosives either acids or bases? [closed]
Are all corrosives either acid or a base? From what I could remember from school, strong acids and bases can be corrosive, but can substances be corrosive from reasons other than that? I tried my best ...
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Rusting of iron is quicker in saline water than in ordinary water [duplicate]
I feel so because, saline water has more more electrons and because of that there will be oxidation will take place faster and hence the overall process will speed up. Is this explanation good enough ...
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Why does the corrosion of a steel nail develop iron ions in the ends of the nail and hydroxide in the middle of the nail?
We did an experiment in school where we put a steel nail in a solution consisting of:
1 g agar;
100 ml water;
100 ml indicator solution (which gets blue whenever $\ce{Fe^2+}$ is created and red when $...
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Should I be concerned about a galvanic reaction between silver solder and stainless steel?
I would like to solder a drain fitting onto my ultrasonic cleaner's tank. The fitting and the tank are both stainless steel. During its operation, the tank is filled with a cleaning solution and heat ...
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Will aluminum continue to corrode after its surface is oxidized?
After doing some reading, it is common to read that aluminum is corroded by oxygen, but that the thin layer of aluminum oxide protects the internal metal from further damage. How much does this layer ...
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