Page 182 - CW E-Magazine (16-4-2024)

AMAI Conference

heat exchangers and evaporators. He Ltd. (CPP), discussed the selection cri- structures. Concrete, even though strong,
noted that heat exchangers are subject teria for resin systems and glass fi bres is prone to physico-mechanical, chemi-
to different corrosion mechanisms, but in pipes. He spoke about the impact cal and biological degradation, he said
the most common are general or uniform of chemicals on metal piping and the and cited a European study on causes
corrosion, pitting corrosion, and stress advantages of using FRP (Fibre Rein- of RCC (Reinforced Cement Concrete)
corrosion cracking (SCC). He also listed forced Plastic) in pipes. structure deterioration, which found cor-
the various methods to test all types rosion of steel to be the main reason.
of corrosion. Mr. Ojha gave details Mr. Rajendra Khanolkar, representing
about an alloy developed by Alleima Chemours India Ltd., gave information The common causes of corrosion in
for chlor-alkali applications, which offers on the company’s Stremax branded coat- concrete are due to ingress of chloride
similar resistance to nickel-based alloys, ing for heat exchangers handling corro- ions and carbonation. Carbonation of
but with high strength and higher sive chemicals. This fl uoropolymer coat- concrete is the chemical reaction bet-
erosion resistance. ing is used to protect equipment exposed ween carbon dioxide in the air and cal-
to extreme temperature and corrosive cium hydroxide and hydrated calcium
Corrosion protection with use of chemicals and is effective in combating silicate in the concrete to give mainly
epoxy resins was the topic of the presen- most severe fouling/corrosive services, carbonates. This process slowly chan-
tation by Mr. Diganta Khataniar, GM- he said. Later, Mr. Mangesh Watane of ges the pH in the concrete. In reinforced
Coating Formulation and Application, Chemours India, described the use of concrete construction, this change in
Grasim Epoxy Division. Tefl on fl uoropolymers in pipes and pH can disrupt the corrosion passi-
fi ttings for corrosive applications. vation of the steel reinforcement and, if
Coatings protect against corrosion moisture and oxygen are available, the
via the barrier effect, inhibition effect Mr. Roy Philip, Vice President Ope- steel reinforcement can start to corrode,
or galvanic effect, he explained. In rations, Horizon Polymer Engineering said Dr. Karade. He also explained
‘barrier effect’ a physical barrier reduces Pvt. Ltd., spoke about the work done by about the available corrosion protection
the diffusion of species that can his company in the fi eld of fl uoropoly- methods for new and existing struc-
cause corrosion, while the inhibition mer applications and the offering of a tures. ‘Prevention is better than cure’ is
effect is brought about by a chemical wide range of qualifi ed products based the most appropriate approach for cor-
reaction that minimises or prevents corro- on technology and polymer processing rosion mitigation, he emphasised.
sion and the galvanic effect is achieved capabilities. “We are the only processor
via altering the electrochemical reac- in India to have acquired global poly- Dr. CH. Jagan Mohan Rao, Managing
tion forcing the oxidation of a different mer processing technology – a proprie- Director, Parahsakthy Power Technologies
substance. Mr. Khataniar described the tary process to produce an optimised Pvt. Ltd., gave details about a water soft-
criteria for selection of epoxy resins PTFE liner. The patented pipe lining ener developed by his company. This non-
and crosslinkers for corrosion protec- process, Thermalok, adopted by Horizon chemical, nano-catalytic, water treatment
tion. He emphasised the need for the Polymer, has proven to be the most reli- system has been operating effectively in
industry to seek out water-based coat- able method for lining pipes,” he said. preventing hard scale build-up in several
ings given the likelihood of regulations heat exchange plants, boilers and condens-
getting more stringent for VOC emis- In his presentation Dr. S.R. Karade, ers chilling plants. A concurrent exhibition
sions from solvent-based paints. Chief Scientist and Head-ACSC Divi- was held at the conference venue on both
sion, CSIR-Central Building Research the days with participation from lead-
Mr. Mangesh Fasate, Technical Institute, Roorkee, covered corrosion ing organisations and technology provi-
Manager, Chemical Process Piping Pvt. problems in steel-reinforced concrete ders.
Chemical Weekly | Import-Export Data | Market Surveys
Directories | Business Forums | Expositions

The only organisation in India catering exclusively to the needs of the entire chemical industry
Contact:
SEVAK PUBLICATIONS PVT. LTD.
602-B, Godrej Coliseum, K.J. Somaiya Hospital Road, Behind Everard Nagar, Sion (E), Mumbai 400 022.
Phone: +91-22-24044471 / 72; Email: admin@chemicalweekly.com

182 Chemical Weekly April 16, 2024

Contents Index to Advertisers Index to Products Advertised