ANTI CORROSION CHEMICALS (S.T.P.P. AND NaNO2)

Corrosion is a chemical process and causes the wastage as a chemical action is of two types, (a) Direct Chemical Corrosion (b) Electro-Chemical attack.

Due to both types of reactions there is decrease in the free energy of the system. Direct chemical corrosion takes place  when a   metal is in contact with gases or moisture.  Electro-chemical attack  is  brought about when a metal is immersed in  a  liquid, there is a current set up in the system. The  current is  carried by  electrodes  of  the  corroding metal  and  the  ions  of  the solution.  The  current is carried by the metal ions  which  pass into solution or by ions in the solution which may or may not  be metal ion, depositing over the metal surface.

Metal  component  of automobile cooling  system  exposed  to water  corrode and rust and create contamination that  will  clog the  water  jackets and radiator passages. Due to  corrosion  the damager cooling system take place as a loss of metal resulting in failure  or pertoration of parts, furthermore, corrosion  on  the surface of affected metal reduces heat transfer within the  water jackets and in the tubes of the radiator even before it builds to the point of clogging the tube themselves.

Corrosion  on  some specific metals in  the  cooling  system such  as stainless steel brass solder, aluminium, and copper  may be  the result of direct attack by water, but it is  more  likely caused  by  galvanic  corrosion,  sometimes  calles  electrolytic corrosion.  Galvanic  action  occurs  when  desimilar  metals  in contact are unmersed in a liquid that can carry a current.

In  water  cooling  system,  poly  phosphate  nitrites,  and chromates  has been used, although in recent year the use of  the alter  has  been  discouraged even in closed system  because  of environmental  consideration.  The anti-freeze mixtuers  used  in automoblie  cooling systems present a difficult  problem  because of  the presence of metal like, iron, copper,  lead-tin  solders, aluminium, as well as rubber are in contact, encourages  galvanic corrosion.  The successful chemical are Borates,  PolyPhosphates, and mercapto benzothiazole (an organic inhibitors).

Other corrosion inhibitors are chromate with poly phosphates zinc or both, zinc with phosphonates or silicate, phosphonatemolybdate or lignin derivation, and polyphosphate with phosphonate or silicate.

INTRODUCTION
PROPERTIES & USES OF CHEMICAL INHIBITORS
LIST OF ANTI CORROSIVE CHEMICALS
B.I.S. SPECIFICATIONS
MARKET POTENTIAL
IMPORT DATA OF ANTI CORROSIVE
EXPORT DATA OF ANTICORROSION
MANUFACTURERS OF S.T.P.P
SODIUM NITRITE
PROCESS OF MANUFACTURE
TECHNOLOGY AND ENGINEERING OF SODIUM TRIPOLY PHOSPHATE
DRY SINGLE-STAGE METHOD OF SODIUM TRIPOLYPHOSPHATE
MANUFACTURING PROCESS FOR THE PREPARATION OF ZINC PHOSPHATE
MANUFACTURING PROCESS FOR THE PREPARATION OF ZINC PHOSPHATE
PROCESS FLOW DIAGRAM FOR THE MANUFACTURE OF ZINC PHOSPHATE
RAW MATERIAL REQUIREMENTS
MANUFACTURE OF SODIUM TRIPOLYPHOSPHATE (NA5P3O10 OR STPP)
PLANT LAYOUT
PRINCIPLES OF PLANT LAYOUT
PLANT LOCATION FACTORS
EXPLANATION OF TERMS USED IN THE PROJECT REPORT
PROJECT IMPLEMENTATION SCHEDULES
SUPPLIERS OF PLANT AND MACHINERY
SUPPLIERS OF RAW MATERIALS

APPENDIX – A:

1.      COST OF PLANT ECONOMICS
2.      LAND & BUILDING
3.      PLANT AND MACHINERY
4.      FIXED CAPITAL INVESTMENT
5.      RAW MATERIAL
6.      SALARY AND WAGES
7.      UTILITIES AND OVERHEADS
8.      TOTAL WORKING CAPITAL
9.      COST OF PRODUCTION
10.      PROFITABILITY ANALYSIS
11.      BREAK EVEN POINT
12.      RESOURCES OF FINANCE
13.      INTEREST CHART
14.      DEPRECIATION CHART
15.      CASH FLOW STATEMENT
16.      PROJECTED BALANCE SHEET