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WorksheetsCHAPTER 7 : CORROSION
Total questions: 25
Worksheet time: 13mins
Corrosion can be devided into two categories :
good and bad corrosion
dry and oxidation
wet and dry corrosion
electromagmentic & electrochemical corrosion
corrosion can be define as :
the deterioration of a material resulting from chemical attack by its behavior.
the deterioration of a material resulting from chemical attack by its salt.
the deterioration of a material resulting from chemical attack by its metal.
the deterioration of a material resulting from chemical attack by its environment.
how corrosion can be happen?
A loss of electrons of metals reacting with air and oxygen.
A loss of electrons of metals reacting with water and oxygen.
A loss of electrons of metals reacting with water and salt
A loss of electrons of metals reacting with nitrogen and oxygen.
The fundamental components in an electrochemical corrosion cell are below, except :
anodic site
cathodic site
electron configuration
electrolyte
The anodic reaction, consisting of the_________ of the metal
reaction
reduction
oxidation
quality
Metal at the anode is oxidised causing it to:
magnetized
break
bright
loss mass
Most common electrolyte mediums are below except
water
soil
chloride contaminated concrete
oil
𝑀 → 𝑀 𝑛+ + 𝑛 𝑒− happen during _______ process
oxidation
reduction
reaction
𝑀 𝑛+ + 𝑛 𝑒− → M happen to element that _________ electron
loss
donate
share
gain
electropositive means tendency of element to _________ electrons
gain
lose
share
electronegative normally happen to_________ element
group 1,2,3
group 15,16,17
group whatsapp
a system consisting of electrodes that dip into an electrolyte and in which a chemical reaction either uses or generates an electric current is definition to :
dry corrosion
electrochemical reaction
galvanizing process
electrochemical cell
_________ function is to keep the solutions electrically neutral and allow the free flow of ions from one cell to another
salt bridge
mg bridge
MCL bridge
London bridge
Zn (s) → Zn2+ (aq) + 2e– is half reaction to
reduction
oxidation
Cu2+ (aq) + 2e– → Cu (s) is half reaction to
reduction
oxidation
_______ : the electrode at which oxidation occurs
anode
cathode
_______ : the electrode at which reduction occurs
anode
cathode
Passive behavior results from the formation of a highly adherent and very thin oxide film on the metal surface, is a definition to
electrochemical cell
gravity
passivity
sacrificial metal
is the attack of a metal at essentially the same at all exposed areas of its surface
intergranular corrosion
crevice corrosion
uniform corrosion
an electrochemical process in which one metal corrodes preferentially when it is in contact with a different type of metal and both metals are in an electrolyte
intergranular corrosion
crevice corrosion
uniform corrosion
galvanic corrosion
Corrosion of metallic surfaces can be reduced or controlled by the addition of a small amount of chemical compounds to the corrosive environment
coating
inhibitors
cathodic protection
protection of a metal by connecting it to a sacrificial anode or by impressing a direct current voltage to make it a cathode
coating
inhibitors
cathodic protection
modifications can help reduce corrosion and improve the durability of any existing protective anti-corrosive coatings.
welding
material
design
the selection of the sacrificial metal can be wisely choose in
periodic table
electrochemical series
design analysis
IN ORDER TO PROTECT THE STEEL HULL, MORE _____________ MUST BE ATTACHED TO THE STEEL HULL
CATHODIC
ANODIC
PERIODIC
