Iron

The presence of Iron in condensate indicates corrosion, more than likely from improper use of amines.

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Videos

 

Water Testing -

Iron -

Test Strips

6:17

 

Water Testing -

Iron -

Colorimeter

2:09

 

Water Testing -

Iron -

Metal Corrosion

3:22

 

Molybdate

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Molybdenum forms a thin layer of Iron Molybdate (FeMoO  ) on steel surfaces which resists corrosion.  Molybdates resist MIC (microbiologically influenced corrosion) better than Nitrites.

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Videos

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Water Testing -

Molybdate -

A World with Molybdenum

3:10

 

Water Testing -

Molybdate -

Colorimeter Test Kit

1:49

 

Water Testing -

Molybdate -

Titration Test Kit

7:24

Note: one of the reagents used in this kit has a shelf life of 6 months.

 

Nitrite

Nitrite (NO  ) forms a thin layer on steel surfaces which resists corrosion.  

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Videos

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molecular-structure-of-nitrates-and-nitr
 

Water Testing -

Iron -

History of Iron

13:35

 

Water Testing -

Nitrite -

Colorimeter Test kit

3:39

HR = High Range for water only boilers.

 

Water Testing -

Nitrite -

Titration Test kit

2:30

 

Water Testing -

Nitrite -

Nitrite in Glycol Test Kit

4:38

Ceric Oxidation of Nitrite =  "CAN" method

 

Water Testing -

Nitrite -

Nitrogen: How it is Used

4:58

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Dissolved Oxygen (DO)

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Oxygen is very corrosive when in hot water. Even small amounts can cause serious problems.  Through deaeration and then chemical scavenging, boiler water becomes virtually free of O   

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Defined

High Range: PPM (mg/L)

Low Range: PPB (for power plants)

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ppm = pars per million,  ppb = parts per billion

 

Water Testing -

Oxygen (DO)- LR: PPB

Colorimetric Test Kit

5:00

For boiler feedwater.

 

Water Testing -

Oxygen (DO)- Defined

5:22

 

Water Testing -

Oxygen (DO)- HR: PPM

Winkler Method

6:05

 

Water Testing -

Oxygen (DO)- HR: PPM

Digital Probe

8:28

 

Water Testing -

Oxygen (DO)- HR: PPM

Colorimetric Test Kit

4:26

 

ORP: Oxidation/Reduction Potential

Videos:

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ORP, also known as REDOX, is a measurement that reflects the ability of a molecule to reduce or oxidize another molecule.

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Oxidation is the loss of electrons, so oxidizers accept electrons from other molecules and have a positive ORP value.

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Reduction is the gain of electrons, so reducers donate electrons to other molecules and have a negative ORP value.

 

Water Testing -

ORP - REDOX Reactions

2:54

 

Water Testing -

ORP - ORP vs pH

4:55

 

Water Testing -

ORP -

Oxidants vs Anti-oxidants

3:07