0
Which one will corrode first of Zn and Cu metals were welded together?
Wiki User
∙ 13y ago
Zinc
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
When were alloys made?
Alloys are two or more metals mixed together, which occurs in nature. The first major alloy in human history is bronze.
What are 2 or more metals mixed together called?
Il several metals have been mixed together it is a mixture, if that mixture is then melted so that the metals mingle at the atomic level it is an alloy. However for certain metals that have widely different melting points making an alloy by simply melting the mixture of those metals will not work (the lower melting temperature metals will melt first and separate from the mixture, in some cases one or metals might even evaporate before the higher melting temperature metals have begun to melt). For such alloys the metals must be melted in groups forming other alloys that must then be blended to create the final intended alloy.
What metal corrodes with water?
All of them, to a greater or lesser degree, depending on their position in the "Electromotive Series of Metals," also known as the "Galvanic Series of Metals." This is a list of metals in order from most to least reactive in sea water. If there are two metals near each other in salt water, the one which is the more reacive (a.k.a. "least noble") will corrode, thus protecting the other metal. This is why ships often put chunks of zinc (called "zinc lozenges") near the propeller---without the zinc, the steel hull would corrode very quickly as it is more reactive than the bronze propeller. The zinc is more reactive than steel even, so it will do all the corroding and the hull is protected. Of course you have to replace your zinc lozenges periodically, as they will corrode away to nothingness eventually. Here is a simple one: From Most Noble (Protected Metals) to Least Noble (Corroded Metals): Mercury Vanadium Gold Silver Monel Nickel Passivated Stainless Steel (rare type) Copper Brass Tin Lead Active Stainless Steel (most common type) Cast Iron Steel Aluminum Zinc Magnesium You see that zinc is quite low on the list, and will corrode first and thus protect everything above it. Stainless steel is higher than ordinary steel---it stays stainless by forcing everything below it (like ordinary steel) to do the corroding. However, if you put stainless steel alongside nickel in salt water, the stainless will do the corroding and the nickel will be protected. Fancier lists include more metals and alloys of different metals. Some links to corrosion and the electromotive series of metals: http://en.wikipedia.org/wiki/Galvanic_series http://www.corrosion-doctors.org/Definitions/galvanic-series.htm http://www.experiencefestival.com/a/Corrosion_-_Electrochemical_theory/id/1262459
Are alkali metals the first or second group?
First group
What does the elements on the left side of the periodic table do?
The first column on the left are alkali metals. Then alkali earth metals then the middle section is transition metals
What happens when you use zinc and galvalnized metal together?
The zinc will corrode first.
If a relay switch is bad will the dash blinker lights stay on?
Possibly. If the contacts on the relay are welded together then yes. You first need to see if voltage is constant to the coil of the relay thus causing the points to be magnetically held together.
How long have metals been around?
How long has meatle welding been around. When people started melting copper and zinc to produce bronze they found that pouring molten between two castings melted the edges and "welded" the pieces together. This was probably the first welding that was performed.
What element is the first of the alkali metals?
Lithium is the first of the alkali metals
When were alloys made?
Alloys are two or more metals mixed together, which occurs in nature. The first major alloy in human history is bronze.
Which metals rust faster steel zinc-coated steel iron or copper and why?
I would like to make two things clear. -Copper is metal, so your question is like "What tastes better? Fruit or apple?" - Rusting is restricted to Iron, another metal. The word "Corrosion" is used for all other metals, such as Copper. Corrosion and Rusting are pretty much the same, but they are used in different places. If you wanted to know if Other Metals corrode faster than Copper, the answer would be that it depends on the metal in question. Most metals, like Iron, Aluminum, Zinc,etc , are more reactive than Copper, so they corrode faster. However, some metals, like Mercury, Silver, Platinum, Gold, etc, are less reactive, so they corrode slower than Copper. I hope this answers your question.
What percentage of the first 36 elements in the periodic table are metals?
50% of the first 36 elements in the table are metals. 18 metals 9 non-metals (25%) and 9 (25%)gasses which are also non-metals.
Butt-weld and grrove weld?
First, Butt-weld is short for a butt groove. Welding in a butt-groove starts at the throat of the butt-groove. The first weld point could be a tack-weld: holding the two materials to be welded together. The throat is measured and filler metal and electrode are determined to create the root pass.
What are 2 or more metals mixed together called?
Il several metals have been mixed together it is a mixture, if that mixture is then melted so that the metals mingle at the atomic level it is an alloy. However for certain metals that have widely different melting points making an alloy by simply melting the mixture of those metals will not work (the lower melting temperature metals will melt first and separate from the mixture, in some cases one or metals might even evaporate before the higher melting temperature metals have begun to melt). For such alloys the metals must be melted in groups forming other alloys that must then be blended to create the final intended alloy.
What metal corrodes with water?
All of them, to a greater or lesser degree, depending on their position in the "Electromotive Series of Metals," also known as the "Galvanic Series of Metals." This is a list of metals in order from most to least reactive in sea water. If there are two metals near each other in salt water, the one which is the more reacive (a.k.a. "least noble") will corrode, thus protecting the other metal. This is why ships often put chunks of zinc (called "zinc lozenges") near the propeller---without the zinc, the steel hull would corrode very quickly as it is more reactive than the bronze propeller. The zinc is more reactive than steel even, so it will do all the corroding and the hull is protected. Of course you have to replace your zinc lozenges periodically, as they will corrode away to nothingness eventually. Here is a simple one: From Most Noble (Protected Metals) to Least Noble (Corroded Metals): Mercury Vanadium Gold Silver Monel Nickel Passivated Stainless Steel (rare type) Copper Brass Tin Lead Active Stainless Steel (most common type) Cast Iron Steel Aluminum Zinc Magnesium You see that zinc is quite low on the list, and will corrode first and thus protect everything above it. Stainless steel is higher than ordinary steel---it stays stainless by forcing everything below it (like ordinary steel) to do the corroding. However, if you put stainless steel alongside nickel in salt water, the stainless will do the corroding and the nickel will be protected. Fancier lists include more metals and alloys of different metals. Some links to corrosion and the electromotive series of metals: http://en.wikipedia.org/wiki/Galvanic_series http://www.corrosion-doctors.org/Definitions/galvanic-series.htm http://www.experiencefestival.com/a/Corrosion_-_Electrochemical_theory/id/1262459
What is the first of the alkali metals?
Lithium
What are the most reactive metals called?
The most reactive metals (those in the first group of the periodic table) are called Alkali metals.
