MiC Europe

The Process of Passification

How Does MIC-Guard™ (Patent Pending) Work?
MIC-Guard™ takes a unique approach to the complex corrosion problems in FPS: It protects the internal piping and fittings surface area by a process called passification .MIC Guard forms a reversable mono atomic film on the anodic sites..

To understand this passification process, look at Stainless Steel. Stainless Steels all contain chromium ions which naturally attract oxygen molecules to form a tight but thin layer of oxygen on the surface of the metal. This thin layer of passivity protects the pipe against sources of chemical corrosion. When Stainless Steels are cut or welded, this oxygen layer is disrupted, but rapidly restores itself with oxygen from the air or water. However, Stainless Steels are still vulnerable to MIC attack, because aerobic bacteria remove the layer of oxygen needed for anaerobic bacteria attachment.
(To see a larger diagram please click on the images.)

Black Iron and other ferrous metals and copper also attract oxygen ions to the metal's surface. The ionic bond is extremely weak, though, and holes exist in the layer of passivity. MIC and chemical corrosion forces can enter through these holes and begin the corrosive process. In chemical corrosion the ferrous iron is changed to ferric compounds or dissolved by acid. MIC corrosion results in the metal being chemically processed to form other compounds, while energy is derived from and used by the bacteria involved in the MIC process.

The Oxygen molecule has a negative or anionic charge and is attracted to cationic or positively charged ions. This is why the oxygen is attracted to the iron layer. MIC-Guard™ was formulated to have a cationic charge (+) and be attracted to the anionic charge (-) of the oxygen layer on the surface of the iron. The MIC-Guard™ layer covers the entire surface, filling in the gaps of the oxygen layer. The result is a passive, tenacious layer protecting the internal surface of piping and fittings from complex corrosion attack. MIC-Guard™ is biologically degradable and REACH registred as braod spectrum corrosion inhibitor.

Mechanical and velocity energies sometimes create holes in the passive layer of MIC-Guard™ . Laboratory testing has proven that an excess of MIC-Guard™ in the water will be attracted to the exposed oxygen layer and repair the MIC-Guard™ layer. Maintenance levels of MIC-Guard™ can be tested and maintained to ensure protection from complex corrosion problems after primary treatment.

Corrosion performance of MIC Guard is also corroborated via standard DIN 51360, IP 125, IP 287 and

ASTM D4627-86

Testmethodology:

-Electrochemical impedance spectroscopy (EIS)

-Linear polarization (LP)

-Potentiodynamic polarization (PDP)

-Open circuit potential (OCP)

-Gravimetric analysis

note: ParGuard™ # MICGuard™



Evaluation Cleaning Coating Maintenance System Summation Environment MIC Links MIC Testing Privacy Policy Water Testing Foaming unit Central heating systems City water heating lines SRB APB IRB SLYM HAB Technical Specifications Film plugged esfr / aerosol Film endoscoop dry system	The Process of Passification How Does MIC-Guard™ (Patent Pending) Work? MIC-Guard™ takes a unique approach to the complex corrosion problems in FPS: It protects the internal piping and fittings surface area by a process called passification .MIC Guard forms a reversable mono atomic film on the anodic sites.. To understand this passification process, look at Stainless Steel. Stainless Steels all contain chromium ions which naturally attract oxygen molecules to form a tight but thin layer of oxygen on the surface of the metal. This thin layer of passivity protects the pipe against sources of chemical corrosion. When Stainless Steels are cut or welded, this oxygen layer is disrupted, but rapidly restores itself with oxygen from the air or water. However, Stainless Steels are still vulnerable to MIC attack, because aerobic bacteria remove the layer of oxygen needed for anaerobic bacteria attachment. (To see a larger diagram please click on the images.) Black Iron and other ferrous metals and copper also attract oxygen ions to the metal's surface. The ionic bond is extremely weak, though, and holes exist in the layer of passivity. MIC and chemical corrosion forces can enter through these holes and begin the corrosive process. In chemical corrosion the ferrous iron is changed to ferric compounds or dissolved by acid. MIC corrosion results in the metal being chemically processed to form other compounds, while energy is derived from and used by the bacteria involved in the MIC process. The Oxygen molecule has a negative or anionic charge and is attracted to cationic or positively charged ions. This is why the oxygen is attracted to the iron layer. MIC-Guard™ was formulated to have a cationic charge (+) and be attracted to the anionic charge (-) of the oxygen layer on the surface of the iron. The MIC-Guard™ layer covers the entire surface, filling in the gaps of the oxygen layer. The result is a passive, tenacious layer protecting the internal surface of piping and fittings from complex corrosion attack. MIC-Guard™ is biologically degradable and REACH registred as braod spectrum corrosion inhibitor. Mechanical and velocity energies sometimes create holes in the passive layer of MIC-Guard™ . Laboratory testing has proven that an excess of MIC-Guard™ in the water will be attracted to the exposed oxygen layer and repair the MIC-Guard™ layer. Maintenance levels of MIC-Guard™ can be tested and maintained to ensure protection from complex corrosion problems after primary treatment. Corrosion performance of MIC Guard is also corroborated via standard DIN 51360, IP 125, IP 287 and ASTM D4627-86 Testmethodology: -Electrochemical impedance spectroscopy (EIS) -Linear polarization (LP) -Potentiodynamic polarization (PDP) -Open circuit potential (OCP) -Gravimetric analysis note: ParGuard™ # MICGuard™
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