GE P&W PAS4011 User Manual

Steamate* PAS4011

Condensate Corrosion Inhibitor

Fact Sheet

• Combines the corrosion protection of neutraliz-

ing amines with the metal conditioning of an
organic oxygen scavenger

• Includes the patented GE Diamine, to maximize

neutralization of acids in condensate systems

• Reduces condensate iron and copper levels,

increasing the quantity and quality of reusable
condensate and minimizing waste

Description and Use

Condensate corrosion products are one of the ma­jor contributors to deposition in boiler feedwater
heaters, economizers, and on boiler internal sur­faces. Condensate corrosion is primarily caused by
the presence of carbon dioxide and oxygen. Feed­water alkalinity decomposes in the boiler to pro­duce carbon dioxide, which evolves into the steam.
This gas dissolves into the condensate to produce
carbonic acid, lowering the condensate pH and
producing metal loss.

Oxygen is found in condensate systems primarily
because of air leakage into the system through
condensers and transfer pumps. Once in the con­densate system, oxygen attacks metal through a
pitting corrosion mechanism. The metal oxides pro­duced through condensate corrosion can return to
the boiler in the feedwater system, where they may
deposit on economizer and boiler internal surfaces.
Deposits of metal oxides impede heat transfer and
cause metal overheating and failures. If the corro­sion problem in the selected condensate stream is
severe, the stream is frequently sent to waste in­stead of being returned to the feedwater system.
This increases the demand and operating costs for
the influent treatment and waste treatment sys­tems.

In order to protect against carbonic acid corrosion
throughout a condensate system, Steamate
PAS4011 uses a unique blend of neutralizing
amines, chosen for their ability to distribute
throughout complex steam and condensate sys­tems, and for their superior abilities to neutralize
acids and elevate condensate pH. This blend in­cludes the patented GE Diamine, one of the most
powerful neutralizers available for condensate cor­rosion control.

In addition to the blend of neutralizing amines,
Steamate PAS4011 utilizes an organic oxygen scav­enger and metal conditioner. The oxygen scavenger
reacts with oxygen to minimize pitting and corro­sion and promotes the formation of protective iron
oxide in the condensate system. Once the protec­tive metal oxide layer is formed, continued feed of
Steamate PAS4011 helps to maintain it. The results
are improved corrosion control and a reduced level
of corrosion products in the boiler feedwater.

Improved corrosion control reduces the potential
for boiler tube failures and the need to dump con­densate to waste. It also minimizes energy and
maintenance costs associated with corrosion­related failures of piping, exchangers, and steam
traps. Improved feed-water quality can also provide
increased cycles of concentration in boiler systems,
which means saving water, chemicals, and energy.

Treatment and Feeding Requirements

Steamate PAS4011 can be fed to the feedwater, main steam heater, or condensate system for system wide effectiveness.

Control is based upon a combination of boiler
feedwater alkalinity, system metallurgy, and
amount of returned condensate. Your GE
representative will assist you in determining an op-

Americas

Watertown, MA
[phone]

Find a contact near you by
visiting www.gewater.com or
e-mailing [e-mail].

©2007, General Electric Company. All rights reserved.
* Trademark of General Electric Company; may be registered in one or more countries.

Global Headquarters

Trevose, PA
[phone]

Europe/Middle East/Africa

Heverlee, Belgium
[phone]

AM-FSbSteamatePAS4011_EN.doc Oct-07

Asia/Pacific

Shanghai, China
[phone]

timal feedrate for your system. Steamate PAS4011
should be fed continuously.

This product can be fed neat or diluted to any convenient feeding strength. Good quality condensate or demineralized water should be used for dilution.

Chemical feed tanks and storage tanks should be
mild or stainless steel. Mild steel pumps, valves, and
feedlines are acceptable. This product is not
compatible with PVC, nylon, natural rubber, butyl
rubber, Buna N, Buna S, urethane, Tygon, or Viton.
The product is compatible with Teflon and
polypropylene. (Tygon is a registered trademark of
Norton Co., Viton and Teflon are registered
trademarks of DuPont.)

General Properties

Physical properties of Steamate PAS4011 are
shown on the Material Safety Data Sheet, a copy of
which is available on request.

Packaging Information

Steamate PAS4011 is a liquid blend, available in a
wide variety of customized containers and delivery
methods. Contact your GE representative for de­tails.

Storage

Store the product in a ventilated area, in the shade,
away from heat or open flame.

Safety Precautions

A Material Safety Data Sheet containing detailed
information about this product is available upon
request.

Page 2 Steamate PAS4011 Fact Sheet