Corrosion Inhibitors

Corrosion in general terminology is the destructive attack of metal. Metal loss or damage can occur due to chemical & electrochemical reaction, physical erosion or biological attack. Corrosion is always because of chemical reaction. Water corrosiveness is determined by the impurities present in it. Oxygen, dissolved solids, gases and acids in water attack the common construction material.

Major Problems due to Corrosion:-
1) Metal loss (capital loss)
2) System leakage or burst
3) Water / Fluid contamination
4) 4) Poor heat transfer efficiency (power loss)

Corrosion are of various types and differs with application to application. Such as:-

MAJOR TYPES OF BOILER CORROSION
i) Uniform/General Corrosion due to high temperature
ii) Pitting Corrosion due to high temperature and chloride
iii) Galvanic Corrosion due to multi-metals
iv) Oxidation Corrosion due to oxygen and carbon dioxide
v) Stress Cracking Corrosion due to high pressure and temp.

MAJOR TYPES OF COOLING WATER CORROSION
i) Uniform/General Corrosion due to high temperature
ii) Pitting Corrosion due to high chlorine and bromine
iii) Galvanic Corrosion due to multi-metals
iv) MIC (Microbiologically Induced Corrosion)
v) Erosion Corrosion due to fast flowing fluid with abrasives

MAJOR TYPES OF CLOSED CIRCUIT SYSTEM CORROSION
for Hot/Chilled Water System:-
i) Oxidation Corrosion due to oxygen and air entrapment
ii) MIC (Microbiologically Induced Corrosion)
iii) Erosion Corrosion due to fast flowing fluid with abrasives
for Glycol Brine / Methanol Brine System:-
iv) Pitting and Uniform Corrosion due to formation of acids
for Calcium Chloride and Sodium Chloride Brine System:-
v) Pitting Corrosion due to high chlorine and bromine

Corrosion Inhibitors are chemical compounds that prevent corrosion attack on system metal. Each corrosion inhibitor is uniquely designed for the given application. It is not necessary that any chemical composition will function as an effective corrosion inhibitor in all applications. Chemtex offers a wide range of state-of-art corrosion inhibitors for almost every application.

Chemtex offers a wide range of corrosion inhibitors under its registered trade names of ALSTACOOL, ALSTHERM, PROTODIN, THEODIN for:-

• Cooling Water Scale and Corrosion Inhibitor
• Boiler Condensate Line Corrosion Inhibitor
• Boiler Water pH Booster / Alkalinity Builder
• Boiler Catalyzed Oxygen Scavenger
• Closed Loop Chiller / Hot Water Nitrite Corrosion Inhibitor
• Calcium Chloride Or Sodium Chloride Brine Corrosion Inhibitor
• Mono Ethylene Glycol Corrosion Inhibitor
• Propylene Glycol Corrosion Inhibitor
• Methanol Corrosion Inhibitor Diesel Engine Radiator
• Coolant Corrosion Inhibitor