Electrochemical Phosphate Conversion Coatings: A Review

Darband, Ghasem Barati; Aliofkhazraei, M.

doi:10.1142/s0218625x17300039

Cited by 11 publications

(8 citation statements)

References 76 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A certain amount of free phosphoric acid must be present in order to suppress hydrolysis and maintain the stability of the bath for effective precipitation of phosphates on microcathode areas of the metal surface [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Obtaining Luminous Phosphate Coatings on Steel by Cold Method

Konovalova

2022

Materials Research Proceedings

View full text Add to dashboard Cite

Abstract. The possibility of obtaining luminous phosphate coatings on steel by cold method has been studied. Modified cold phosphating solutions containing organic additives (glycerin, trilon B, OS-20 emulsifier) were selected as the basis to maintain the pH, stabilize the solution and improve the quality and structure of the deposited coatings. To obtain the glow effect, a green phosphor based on Zn2SiO4 containing manganese as a sensitizer was added to the phosphating solution. During deposition, phosphate coatings are obtained that glow with spots, but constant mixing of the solution during deposition contributes to the uniform distribution of phosphor in the phosphate film. Luminous phosphate coatings have good protective properties, they can be used as an independent protection of steel surfaces from corrosion.

show abstract

Section: Introductionmentioning

confidence: 99%

Obtaining Luminous Phosphate Coatings on Steel by Cold Method

Konovalova

2022

Materials Research Proceedings

View full text Add to dashboard Cite

show abstract

“…According to previous studies [ 15 , 16 , 17 , 18 ], phosphating is one of the most widely used methods of protection against corrosion in metals [ 19 ]. The phosphating process consists of, with the help of a phosphating solution, a layer of zinc, iron, or manganese phosphate (depending on the major constituent of the phosphating solution) on the surface of the metal [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Immersion Behavior of Carbon Steel, Phosphate Carbon Steel and Phosphate and Painted Carbon Steel in Saltwater

2021

View full text Add to dashboard Cite

The carbon steel is used in many areas due to its good mechanical properties; however, its low corrosion resistance presents a very important problem, for example, when carbon steel carabiners are used in the petroleum industry or navy, the possibility of an accident is higher due to carabiner failure. This phenomenon could occur as a consequence of the corrosion process which negatively affects mechanical properties. This paper study the possibility to improve its corrosion resistance by depositing on its surface a phosphate layer and a paint layer, and also aims to analyze the immersion behavior in saltwater of carbon steel, phosphate carbon steel, and phosphate and painted carbon steel. According to this study, by coating the carbon steel with a phosphate or paint layer, a higher polarization resistance is obtained in saltwater. Moreover, by electrochemical impedance spectroscopy (EIS), it was observed that the corrosion rate decreases with the increase of the immersion time. Meanwhile scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) revealed that the main compounds which formed on the sample’s surface were iron oxides or hydroxy-oxides, after immersion for a longer period. The overall results show that all types of deposited layers increase the corrosion resistance of C45 steel.

show abstract

“…The phosphating process is one of the most widely used methods to increase the corrosion resistance of metallic materials [17]. The components of phosphating solutions are cheap, and the workers who perform the operations do not require high qualification, therefore, low manufacturing costs are involved [18].…”

Section: Introductionmentioning

confidence: 99%

Phosphate Coatings: EIS and SEM Applied to Evaluate the Corrosion Behavior of Steel in Fire Extinguishing Solution

et al. 2021

View full text Add to dashboard Cite

Phosphate coatings are one of the most important methods in preventing metal corrosion, especially iron alloys. The high interest in this method for industrial applications is mainly due to the low costs associated with the phosphating solution component and technological process. Considering this aspect and the advantages offered to the materials (corrosion resistance, good adhesion, wear resistance), this study evaluates the potential of using the phosphate coating method in health and safety applications. Therefore, the deposition of a layer of zinc phosphate on the steel surface used in the manufacture of components for personal protective equipment was approached. Firefighters, during rescue/evacuation operations, use protective equipment for fall arrest, whose accessories (hooks, carabiners) are made of steel. Due to the low corrosion resistance property of carbon steel, these accessories must be replaced frequently. This paper aims to analyze the possibility of improving the corrosion resistance of carbon steel in a fire extinguishing solution. Accordingly, the electrochemical behavior of two different types of coatings was studied by electrochemical impedance spectroscopy (EIS) and scanning electron microscope (SEM). In the literature, different corrosion evaluating methods or systems have been considered, and up until now, there has been no previous study to have approached the corrosive behavior of C45, phosphate C45, and painted phosphate C45 immersed in fire extinguishing solution.

show abstract

Electrochemical Phosphate Conversion Coatings: A Review

Cited by 11 publications

References 76 publications

Obtaining Luminous Phosphate Coatings on Steel by Cold Method

Obtaining Luminous Phosphate Coatings on Steel by Cold Method

Immersion Behavior of Carbon Steel, Phosphate Carbon Steel and Phosphate and Painted Carbon Steel in Saltwater

Phosphate Coatings: EIS and SEM Applied to Evaluate the Corrosion Behavior of Steel in Fire Extinguishing Solution

Contact Info

Product

Resources

About