corrosion proposal ppt
TRANSCRIPT
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CONTROL OF CORROSION IN STEEL
Ahmed Minhajuddin
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Nothing destroys iron, but its owncorrosion!!!
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1.
INTRODUCTION
2. MECHANISM OF CORROSION
3. CORROSION CONTROL
4. RESEARCH PROPOSAL
. CONCLUSION
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What is Corrosion?
C!""!#i!n i# de$ined a# %he de#%"u&%i!n !" de%e"i!"a%i!n !$ a ma%e"ia' (e&au#e !$i%# "ea&%i!n )i%h en*i"!nmen%.
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Mechanism of Corrosion
Anodic and Cathodic Reactions
At Anode surface: Fe 2e ! Fe2!
+me%a''i& i"!n,
At Cathode surface: "#$ O2! %2O ! 2e 2"O%$
ai" )a%e"
At Anode : Fe!! ! 2"O%$ FeO "%2O$&
rust
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Mechanism of Corrosion
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%o' (o We Contro) Corrosion?
The"e a"e $!u" &!mm!n me%h!d# u#ed %! &!n%"!' &!""!#i!n.
Coatings and linings are principal tools for defending against corrosion. These substances
are often applied in conjunction with cathodic protection systems to provide the most cost-
effective protection for a structure.Cathodic Protection (CP) is a technology that uses direct electrical current to counteract
the normal external corrosion of a structure that contains metal such as an underground
petroleum storage tan! or natural gas pipeline. "n new structures CP can help prevent
corrosion from starting# on existing structures# CP can help stop existing corrosion from
getting worse.$aterials selection refers to the selection and use of corrosion-resistant materials such as
stainless steels plastics and special alloys to enhance the life span of a structure. %ome of
the most common materials used in constructing a variety of facilities such as steel and
steel-reinforced concrete can be severely affected by corrosion.Corrosion inhibitors are substances that when added to a particular environment
decrease the rate of attac! of that environment on a material such as metal. They can help
extend the life of e&uipment prevent system shutdowns and failures avoid product
contamination prevent loss of heat transfer and preserve an attractive appearance of
structures.
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%o' (o We Contro) Corrosion?
RE-AR COATIN
SCARIFIED / PATCHED DEC0
AAITS ANODE MESH
FL ASHHOTDIP ALANI5IN
IRELESS SENSOR FOR
MONITORIN CHLORIDE IN
CONCRETE
INHI-ITORS
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What is the science *ehind these materia)s+
C!a%in6# )i'' de*e'!7 mi&"! $'a)# !*e" %ime8 )hi&h a''!) )a%e"8 !9:6en and
(a&%e"ia %! 7ene%"a%e8 7"!*idin6 a 7e"$e&% en*i"!nmen% $!" "u#%. C!""!#i!n &an #%a"%
)i%h mi&"!#&!7i& $'a)# %ha% a"e in*i#i('e %! %he human e:e. On&e #%a"%ed8
&!""!#i!n &an &!n%inue %! #7"ead unde"nea%h %he &!a%in68 un!(#e"*ed (: &a#ua'
*i#ua' in#7e&%i!n. -: %he %ime %he 7"!('em (e&!me# *i#i('e8 &!n#ide"a('e dama6e
&an (e d!ne.
Pa##i*e $i'm de*e'!7# !n %he (a" #u"$a&e
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T!da:;# m!#% #!7hi#%i&a%ed &!""!#i!n7"!%e&%i*e &!a%in6# 6! (e:!nd m!i#%u"e (a""ie"#
and #a&"i$i&ia' e'emen%#. Ad*an&e# in mi&"!en&a7#u'a%i!n ha*e ena('ed de*e'!7men% !$
#ma"% &!a%in6# %ha% &an hea' %hem#e'*e# i$ dama6ed.
The Rise of Smart, Self-Healing Coatings
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Sma"% &!a%in6# &!n%ain mi&"!&a7#u'e# !" &a7#u'e# %ha% ("ea< !7en )hen e97!#ed %! a
7a"%i&u'a" %"i66e". Mi&"!en&a7#u'a%i!n a''!)# an a&%i*e in6"edien%8 #u&h a# a hea'in6
a6en%8 %! #%a: en&'!#ed and 7"!%e&%ed $"!m %he en*i"!nmen% un%i' i% i# needed
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Se'$hea'in6 &!a%in6# a"e a "!(u#% me%h!d !$ &!""!#i!n 7"!%e&%i!n %ha% &anau%!ma%i&a'': "e7ai" dama6e and 7"!'!n6 %he u#e$u' 'i$e !$ %he &!a%in6.
In addi%i!n %! "e'ea#in6 #e'$hea'in6 &hemi&a'#8 %he #ma"% &a7#u'e# de%e&% and
"e*ea' &!""!#i!n $!"min6 !n me%a' (e$!"e i% i# *i#i('e %! %he na %he
7"e#en&e !$ &!""!#i!n i# i%#e'$ %he %"i66e".
I% i# a #in6'e&!m7!nen% #:#%em8 )hi&h d!e# n!% "e?ui"e %he addi%i!n !$ a
#e7a"a%e &a%a':#% %! &u"e %he hea'in6 a6en%. The hea'in6 a6en% i# in#%ead &u"ed (:
%he &!""!#i!n (:7"!du&%#
CONCL,SION
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Thank you.