Linear polarization corrosion inhibitors

At pHs5.6, both UDI and PVI-1 cast films produce passivation, UDI reducing the anodic currents by an order of magnitude more than PVI-1. Linear polarization measurements on Cu in UDI solution (pHs5.6) indicate that UDI may have practical application as a corrosion inhibitor for copper. 

The methods of measuring corrosion rates in the course of testing corrosion inhibitors are conventional weight loss, electrochemical techniques such as linear polarization resistance, potentiodynamic polarization, AC impedance, and electrochemical potential or current noise. 

Linear polarization resistance Testing surface activity, chemical nature of CMP, efficiencies of corrosion inhibitors ASTM (2004). Goonetilleke and Roy (2008), Rock et al. (2012),Klugetal. (2008)... 

Magar [32] evaluated inhibitors in white water by means of the linear polarization resistance technique in a search for effective inhibitors to prevent corrosion of bronze suction rolls. A galvanodynamic testing method was used by DeBerry and Ellis [33] in order to study inhibition of corrosion of a duplex stainless steel alloy. 

Polarization resistance, Rp values for Al-Mg-Si alloy in seawater in the presence and absence of corrosion inhibitor were determined using linear polarization method. The values of Rp are tabulated in Table 3. Generally, the value of Rp increased with increasing inhibitor concentration for all studied inhibitor. The highest Rp values for Al-Mg-Si alloy obtained at... 

Corrosion is an electrochemical process leading to a decrease in thickness and strength of materials. Steel is the most widely used metal in industry and has weak resistance to corrosion. Corrosion resistance can be increased with addition of chrome and nickel. Adding of metals causes an increase in the production cost of steel. To develop the corrosion resistance, polyelectrolyte multilayers can be used to coat stainless steel with low cost [14]. The main aim to coat a metal is to protect it from corrosion. The layer-by-layer self-assembly method is used to prepare polyelectrolyte multilayers. Corrosion of metals can be reduced with inhibitors. Severe corrosion protective coatings are used in many apphcation areas such as automotive, steel, pipe, petroleum and hning industry. Polyelectrolyte multilayers (PEMs) are an alternative method to protect the materials from corrosion. PEMs can be produced with anionic and cationic polyelectrolytes. In addition, PEMs has wide application areas such as membrane separation, microfluidies, biocatalytic and analytical separations. Cationic polyaUylamine hydrochloride (PAH), anionic polystyrene sulfonate (PSS), polystyrene suUbnate-co-maleic acid (PSS-co-MA) and polyacrylic acid (PAA) were used to investigate the corrosion protection efficiency of polyelectrolyte. Corrosion rate, corrosion potential and linear polarization resistance were examined as corrosion process parameters. In addition, polydiaUyldimethylammonium chloride (PDADMAC) was used with sulfonated polyetherether ketone (SPEEK) for steel corrosion applications [14]. 

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