alpha group

7/26/2019 Alpha Group

1/12

ALPHA GROUPLeader: Legutan, Paul S.

Members:

Angeles, Renz

Alonzo, Jann

Carmona, DarlCast!llo, Jamart


2/12

SH"P S#R$SS

POU%D"%G

&!s e'!st ()en s)!*s !s *!t+)!ng. S)!*s bo(s l!-t +lear o-

and +ome do(n )ea!l. "t +auses damage to t)e bottom a

at t)e bo(.

&!s one o- t)e result on o- t)e Dnam!+ -or+es.

&/lat areas are *lat!ng are broug)t !nto !olent +onta+t (at a er a+ute angle.


3/12

SH"P S#R$SS

SLAMM"%G Caused b bo( *!t+)!ng +lear o- t)e (ater t)en +om!n

)ea!l on t)e sea. #)!s !s res!sted b a redu+t!on !n -

*!t+) and *oss!bl !n+reased *late t)!+1ness. 2)!le )

*!t+)!ng, t)e -or(ard end leaes and re&enters t)e (a

slamm!ng e--e+t. "t also +auses damage *r!mar!l on a s)!*.


4/12

SH"P S#R$SS

PA%#"%G Caused b os+!llator mot!on on t)e s)ell *lat!ng at t

and Stern +aused b t)e uneen (ater *ressure as t)

*asses t)roug) (aes. "t !s res!sted b a sstem o- P

0eams, Pant!ng Str!ngers, 0reast Hoo1 and a dee* -

a stress o++urs at t)e end o- a essel due to ar!at!o*ressure on t)e s)ell *lat!ng as t)e essel *!t+)es !n


5/12

SH"P S#R$SS

S#R$SS CAUS$D 03 LOCAL"4$D LOAD"%G Lo+al!zed )ea loads ma g!e r!se to lo+al!zed d!stort!on

transerse se+t!on. Su+) loads ma be t)e ma+)!ner 5Ma!n

t)e eng!ne room or t)e load!ng o- +on+entrated ore !n t)e )

Hea (e!g)ts, su+) as e7u!*ment !n t)e ma+)!ner s*a+e

*art!+ular !tems o- general +argo, +an g!e r!se to stresses d

lo+al!zed d!stort!on o- t)e transerse se+t!on. #)e -!tt!ng o- trbul1)eads, dee* *late -loors and (eb -rames redu+e su+) s


6/12

CORROS"O%

#)e deter!orat!on o- t)e )ulls and -!tt!ngs o- steel s)!*

to *r!mar!l to +orros!on. "- +orros!on +ould be +om*le

el!m!nated *ra+t!+all all su+) *arts (ould last !nde-!n

me+)an!+al (ear and tear, due to use and age, are n

-a+tors !n determ!n!ng t)e l!-e o- su+) *arts.


7/12

CORROS"O%

#reatment o- Sus+e*t!ble mater!als due to +orro

Hulls

Area 0elo( t)e 2aterl!ne

#)!s under(ater area !s *rote+ted -rom +orros!on

-ollo(!ng t)e )ull +onstru+t!on be-ore !t !s laun+)eo- t)e more *o*ular *rote+t!on used !s t(o *art +

e*o' !n +on8un+t!on (!t) a !nl tar +oat.


8/12

CORROS"O%

Decks and Hulls Above the Waterline.

S)!*s de+1s are also l!able to +orros!on due to be!ng !mmersed

sea(ater dur!ng aderse (eat)er de*os!t!ng salt on t)e *lat!ng

(as at sea t)e sa!lors (ere -oreer +)!**!ng a(a and re*a!nt

or )ang!ng oer t)e s!de !n a bosuns +)a!r, atta+1!ng t)e )ull.

not +om*l!mentar to m a-ter lun+) snooze be-ore go!ng on t)

An(a, *rote+t!on o- de+1 and aboe (aterl!ne areas !s +arr!ea (ell tested +omb!nat!on o- al1d and+)lor!nated rubber.


9/12

CORROS"O%

Tanks

0allast #an1s 0allast tan1s are er sus+e*t!ble to +orros!on due to +onstant )um!d!t *romo

sur-a+e (et and dr +ond!t!ons de*end!ng !- t)e s)!* !s ballasted or +arr!ng a

0allast tan1s )ae been a++used o- be!ng t)e !m*orter and s*read!ng o- non&

sea(ater borne mar!ne ba+ter!a, organ!sms and barna+les. Coat!ngs to erad!+

been deelo*ed and are a**l!ed a-ter a +oat!ng o- ant!+orros!e mater!al.

0allast tan1s used to be +oated (!t) +oal tar e*o' 5C#$6 but no( e*o' *rod!n )dro+arbon re-!n!ng )as been deelo*ed. #)!s !s a**l!ed !n t(o +oats and

+urrent met)ods used aga!nst +orros!on !n ballast tan1s.


10/12

CORROS"O%

/res)(ater Storage #an1s

#)ese tan1s used to be +ement (as)ed and t)en +)lor!nated to *+orros!on and *rote+t aga!nst $&Col! and Leg!onna!res d!sease. "

remember t)e taste o- t)e ne(l bun1ered -res) (ater a-ter t)e m

l!berall dosed !t (!t) +)lor!ne. 3u+1; %ot n!+e !n a-ternoon tea, to

about t)e rum;

%o(adas an a**l!+at!on o- *ure e*o', a**l!ed under str!+t gu!de'*er!en+ed +ontra+tor !s one met)od. #)!s +an be su**lemente

str!+tl +ontrolled add!t!on o- s!ler n!trate or +)lor!ne to t)e tan1 b

+ontrol an ba+ter!a !n t)e (ater.


11/12

CORROS"O%

Cargo #an1s

#)!s !s a ast sub8e+t due to t)e ar!ous +argoes +arr!ed b todas meessels -rom +rude o!l to +)em!+als, so (!ll +oer t)!s -ull !n a -uture ar

Cargo #an1 Prote+t!e Coat!ngs.

Ho(eer, !n t)e !nter!m (e (!ll )ae a 7u!+1 loo1 at t)e *rote+t!on o- o!

tan1s !n a +rude o!l tan1er. #)e +orros!on !n t)ese areas !s +aused b t)

and (ater +onta!ned !n t)e +rude, +omb!ned (!t) ot)er (ater a*or and

o- t)e s)!*s stru+ture. M!+robes also +om*l!ment +orros!on as t)e !ng*rote+t!e +oat!ng. #)e ne( )!g) tens!le steels used !n s)!*s +onstru+t!

!nnoat!on o- double )ulled essels )as )ad a detr!mental e--e+t on tan

s!ted to )ae e'a+erbated +orros!on and *!tt!ng !nstan+es.


12/12

$%D O/ PR$S$%#A#"O%

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