corrosion proposal ppt

7/25/2019 Corrosion Proposal ppt

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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


4/13

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


10/13

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.

corrosion proposal ppt

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