USEFUL, BASIC AND TECHNICAL INFORMATION REGARDING CORROSION AND ITS PARTICULARITIES. VERY PRACTICAL AND IMPORTANT FOR PROFESSIONALS IN THE AREA.

1. TEN INFORMATION THAT ANY PROFESSIONAL WHO WORKS WITH
CORROSION MUST KNOW.
Aloysio de Aguiar
CAMPINAS –SP, BRAZIL.

2. TEN INFORMATION THAT ANY PROFESSIONAL WHO WORKS WITH
CORROSION MUST KNOW.
1)What is Corrosion?
Corrosion is a natural process that can be defined as a deterioration of
some material, usually metallic, through chemical or electrochemical
processes associated or not with mechanical stresses. The deterioration
caused by physic-chemical interaction with the material and its environment
represents undesirable detrimental changes suffered by the material, such
as wear, chemical variations or structural modifications, making it
impracticable for use (CORROSION, Vicente Gentil, LCT ed 4 th Edition,
2003 RJ, page 1).
2) Why does corrosion occur in metals?
Corrosion is a natural phenomenon, because metals, like other materials,
seek to be in their lowest energy state and in the case of metals that form
are their oxides, as found in nature.

3. TEN INFORMATION THAT ANY PROFESSIONAL WHO WORKS WITH
CORROSION MUST KNOW.
3) More information: why does corrosion occur?
Metals exist in nature in the form of their minerals and to be useful in
engineering, in steel mills a lot of energy is injected into the blast
furnaces, to transform them into the most high-energy metallic form, and
useful to the industry. Corrosion is the way that nature uses to bring them
back to their original form of lower energy, so a natural phenomenon that
sooner or later will surely occur.
4) What, then, can be done to prevent its attack, such
as combating, controlling, or preventing metal
corrosion?
As a natural process will it certainly occur? What the engineers and
technicians working in the area must do is find the best method and
solution for corrosion does not occur before the end of the life of the
products and equipment.

4. TEN INFORMATION THAT ANY PROFESSIONAL WHO WORKS WITH
CORROSION MUST KNOW.
5.What are these ways of combating, controlling and
preventing corrosion?
There are many ways to prevent corrosion from occurring undesirably. The
first thing that should be done is an analysis of the so-called "ROOT
CAUSE", that is to investigate deeply because the unexpected corrosion
occurred. There is always an answer, a predominant factor or some factors
acting together. Then finding out the root cause(s) you will find the best
solution. The great "ENEMIES" are water in liquid form or as moisture in
the air, oxygen, aggressive agents, dust, etc. Among those available, if
corrosion is occurring during the process we may mention protection with
protective oils or temporary corrosion inhibitors, packaging with volatile
inhibitors type VCI or eliminate the source(s) of corrosion. If corrosion
occurs in the finished product, in addition to the solutions mentioned
above, it is necessary to investigate if the protection used is the most
appropriate or if it is the case of using metallic protective coatings or
paint, more resistant materials, correct corrosion resistant packaging.
These solutions are effective and usually solve, but there are many others
specific to each case.

5. TEN INFORMATION THAT ANY PROFESSIONAL WHO WORKS WITH
CORROSION MUST KNOW.
6) Does it mean that corrosion can't be eliminated?
Unfortunately the answer is NO! But do not despair,
what we call a solution is CORROSION CONTROL, or
find the best and most economical means to ensure
that it does not occur at an undesired moment, in other
words, the product does not present a corrosive attack
before arriving at the next operation, if it is in
process, or to the end customer and during its
projected life. THIS IS THE ONLY SOLUTION! SO
YOU REMEMBER CORROSION CAN'T BE
ELIMINATE, ONLY CONTROLLED!

6. TEN INFORMATION THAT ANY PROFESSIONAL WHO WORKS WITH
CORROSION MUST KNOW.
7) Are all metals susceptible to corrosion?
Again, the answer is unfortunately YES! All metals will exhibit
corrosive attack that can take hours or years, depending on the
metal's inherent resistance and the protection that was applied, as
we mentioned above, understand that it is a natural and irreversible
process. Metals have different behaviors in relation to their
resistance to the medium in which they are exposed. There are
hundreds of metallic materials in the literature and there is a lot of
information about the best material, surface treatment, packaging,
etc. depending on the weather, The environment in which it must
withstand, aggressive agents that may be present, etc. Even
stainless steels can suffer a corrosive attack depending on whether
the specification was incorrect or if something undesirable occur
during the use - Remember there are hundreds of different
stainless steels, each one indicated for each situation.

7. TEN INFORMATION THAT ANY PROFESSIONAL WHO WORKS WITH
CORROSION MUST KNOW.
8) Once the attack has occurred are there solutions
for reuse of the product(s)?
The answer is DEPEND ON CASE BY CASE! If corrosion is identified
during the process and the product will still go through other operations
or rework that can remove corrosion, such as machining the
deteriorated region removes the area under attack or if the material
goes through chemical processes such as pickling, chemical treatments
or electrochemical that remove corrosion prior to the application of the
appropriate treatment, then it is possible to recover and use the
products. If the identification is found on the finished product (s) and
they will not go through other operations on the customer which result
in the removal, as described above, the answer is NO! As already
stated, corrosion is an irreversible process, with no means of causing
oxides and other corrosion products to return to being the same metal
again!

8. TEN INFORMATION THAT ANY PROFESSIONAL WHO WORKS WITH
CORROSION MUST KNOW.
9) Is there any special technique to prevent corrosion
from occurring?
Now the answer is YES! There are solutions called cathodic protection
that through current rectification equipment or sacrificial anodes prevent
the process from occurring by constantly sending printed current where
it is desired to protect. But these solutions are expensive, require
complex installations, constant maintenance and are only indicated and
used in very special cases where corrosion if it occurs can cause damages
to equipment and people with incalculable damages and consequences.
Examples include towers for the transmission of electricity or
telecommunications, meters and trains, oil rigs, large vessels, pipelines,
etc. This is the only way to prevent corrosion from occurring, but
unfortunately it does not apply in most industry cases.

9. TEN INFORMATION THAT ANY PROFESSIONAL WHO WORKS WITH
CORROSION MUST KNOW.
10) Finally:
Corrosion must be understood as a natural process and
there are many ways to control it, but for this it is
imperative to understand the process that resulted in
the attack so the best solution can is used. So far we
only cite corrosion as evil, but there are hundreds of
applications that without corrosion life would be very
difficult or even impossible. Amongst some we can
mention vehicle batteries, cell phones, watches and even
space travel depend on corrosion, so what we should do
is to use our knowledge to control it when necessary and
take advantage of its many benefits. I will soon be
sending a specific material on these advantages so that
the corrosion will be properly understood.

10. TEN INFORMATION THAT ANY PROFESSIONAL WHO WORKS WITH
CORROSION MUST KNOW.
OTHERWISE THE CORROSION WILL BE IN PLACE LIKE THESE
NEXT EXEMPLES:
PICTURE 1 - STEEL
USED WITH TAP
WATER.

11. TEN INFORMATION THAT ANY PROFESSIONAL WHO WORKS WITH
CORROSION MUST KNOW.
PICTURE 2 – SAME
AS 1; STEEL USED
WITH TAP WATER,
OTHER VIEW.

12. TEN INFORMATION THAT ANY PROFESSIONAL WHO WORKS WITH
CORROSION MUST KNOW.
PICTURE 3 – OTHER
SAMPLE THE SAME
STEEL USED WITH
TAP WATER

13. TEN INFORMATION THAT ANY PROFESSIONAL WHO WORKS WITH
CORROSION MUST KNOW.
PICTURE 4 – CAST
IRON WITH
CORROSION DUE TO
THE ATMOSPHERE.

14. TEN INFORMATION THAT ANY PROFESSIONAL WHO WORKS WITH
CORROSION MUST KNOW.
PICTURE 5 – CARBON
STEEL USED IN TAP WATER
WITH SEREVE RUST.

15. TEN INFORMATION THAT ANY PROFESSIONAL WHO WORKS WITH
CORROSION MUST KNOW.
PICTURE 6 – DUMBBELL
FOR FITNESS WITH
GENERALIZED
CORROSION ATTACK.

16. TEN INFORMATION THAT ANY PROFESSIONAL WHO WORKS WITH
CORROSION MUST KNOW.
I HOPE THAT THIS INFORMATION WILL
BE USEFUL AT YOUR WORK!
HAVING ANY SPECIAL ISSUES THAT
HAVE NOT BEEN TREATED HERE WE
WILL HAVE THE PLEASURE TO HELP YOU
WITHIN OUR COMPETENCES.

17. TEN INFORMATION THAT ANY PROFESSIONAL WHO WORKS WITH
CORROSION MUST KNOW.
Below is all the information on how to communicate with us,
whatever are your demands.
Our specialty and focus is Corrosion, but we can assist in other
areas as well.
Visit our website and my Linkedin to get more details of our
performance. Our mission is to serve you and serve you in
whatever you need.
You can count on us.
Thank you,
Aloysio de Aguiar.

18. TEN INFORMATION THAT ANY PROFESSIONAL WHO WORKS WITH
CORROSION MUST KNOW.
Eng. MSc. ALOYSIO DE AGUIAR
➢ WE PLACE HERE THE BASIC INFORMATION, BUT IMPORTANT TO FOR
PROFESSIONALS FACING AND COVERING CORROSION PROBLEMS.
➢ A COMPLETE AND DETAILED COURSE IS OFFERED AND MINISTERED
BY THE SPECIALISTS OF THE COMPANY OF CONSULTANCIES:
Sciencetec & Corrtec - Engineering.
➢ IF YOU HAVE INTEREST, MAKE A CONTACT, OK?
➢ WE ARE HERE TO SERVE YOU IN ANYTHING OR COMPLEXITY OF
YOUR PROBLEM.

19. TEN INFORMATION THAT ANY PROFESSIONAL WHO WORKS WITH
CORROSION MUST KNOW.
➢ COMPANY: Sciencetec&Corrtec – Engineering
➢ SITE: www.stct.com.br
➢ TECHNICAL DIRECTOR: Aloysio de Aguiar
➢ PHONES: 1919 997 901 632 / 19 3325 9123
➢ E-Mail: aaloysio@uol.com.br ; aloysio@stct.com.br
➢ LinkedIn: linkedin.com/in/aloysio-de-aguiar-62083ª
➢ PAGE ST&CT IN LinkedIn:
https://www.linkedin.com/company-beta/15230697/
➢ Twitter: @aaloysio
➢ Facebook:https://facebook.com/aloysio.deaguiar
FOR MORE INFORMATION IN THIS FIELD ACCESS USING ONE OF THE
MEDIA LISTED BELOW. WE WILL BE GLAD TO HELP YOU!