Modified Manganese Phosphate Conversion Coating on Low-Carbon Steel

Duszczyk, Jakub; Siuzdak, Katarzyna; Klimczuk, Tomasz; Strychalska‐Nowak, Judyta; Zaleska-Medynska, Adriana

doi:10.3390/ma13061416

Cited by 7 publications

(2 citation statements)

References 14 publications

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“…The method used in this experimental research was immersion. Immersion is the most suitable method in this case, taking into account the size and shape of the surface to be phosphated, as well as its subsequent use [33,34].…”

Section: Sample Preparationmentioning

confidence: 99%

Microstructural and Mechanical Properties Analysis of Phosphate Layers Deposited on Steel Rebars for Civil Constructions

Lazar,

Cimpoesu,

Istrate

et al. 2024

Coatings

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This paper carries out a study on the microstructural characteristics and mechanical properties of phosphate layers deposited on steel reinforcements for civil constructions. Analyses were performed on 4 sets of samples: 1 control sample (unphosphated) and 2–4 samples that were phosphated with three different solutions. The structural and chemical analysis, as well as the examination of the mechanical properties (surface roughness, microindentation, and scratch resistance) of the phosphate layers deposited on steel rebars for civil constructions, was carried out. The following conclusions were drawn from the experimental results: the coatings show flashes of crystals deposited on the metal surface; chemical homogenization of the phosphated layers is observed; the profiles present a higher roughness after deposition of the phosphated layers; the indentation Young modulus and hardness values recommend the phosphating procedure to improve the CS surface quality; the COF is three times larger for phosphated samples compared with the initial metallic one; and scratch traces are uninterrupted, except for one zone of sample that was phosphated with solution II, wherein the phosphated layer does not present lateral scratches or exfoliations.

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Section: Sample Preparationmentioning

confidence: 99%

Microstructural and Mechanical Properties Analysis of Phosphate Layers Deposited on Steel Rebars for Civil Constructions

Lazar,

Cimpoesu,

Istrate

et al. 2024

Coatings

View full text Add to dashboard Cite

show abstract

“…The quality of the base metal, the method of surface pretreatment, and the technological and operational conditions of the phosphating process (composition of baths, addition of metals to the modified phosphating bath, temperature, treatment time, pH, acceleration, etc.) influence the formation and structure of the phosphate layer [11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Crystal Structure and Properties of Zinc Phosphate Layers on Aluminum and Steel Alloy Surfaces

et al. 2023

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Many studies have been carried out on the phosphating of steel and aluminum alloys used in automotive engineering, but characterization of the properties of the phosphate layers formed by the co-phosphating of these alloys in the presence of different base metals is still lacking. In this study, the crystal structure and properties of the phosphate conversion layers formed on the surface of the aluminum alloys important in vehicle manufacturing (cast and forged AlSi1MgMn, and AA6014 panel) and the CRS SAE 1008/1010 reference steel plate by co-deposition prior to painting were investigated. On a process line set up for the phosphating of typical iron and steel alloys, the phosphate coating was formed using nitrite and nitroguanidine accelerators under identical technological parameters. The microstructure of the formed phosphate layers was examined using scanning electron microscopy (SEM), its phase composition using X-ray diffraction (XRD), and its elemental composition using energy-dispersive X-ray analysis (EDX). The suggested main crystalline phase (Zn2.3(Ni0.1Mn0.6)(PO4)2·4H2O) in the surface phosphate layer of both aluminum alloys studied was similar to hopeite, whereas in the steel plate, a minor hopeite phase were identified in addition to the main crystalline phosphophyllite phase (~95%). It can be concluded that, during the combined phosphating treatments, the surfaces of different aluminum and steel alloys behaved similarly to the individual treatments and did not impede the coating reactions of the other metal. To obtain an adequate coating of aluminum and steel alloys, fluoride should always be present in the production line. Comparing the effects of accelerators, we found that the use of nitrite accelerator with the same amount of fluoride resulted in a higher coverage and better quality of the surface protective layer of the aluminum alloys. However, for the steel plate, there was no significant difference between the phosphate coatings prepared with the two different accelerators.

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Effect of Chromium Content in the Steel Substrate on the Coating Formation and Tribological Properties of Manganese Phosphate Coatings

Nevosad

Molnar

Schwarz

2021

J. of Materi Eng and Perform

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Modified Manganese Phosphate Conversion Coating on Low-Carbon Steel

Cited by 7 publications

References 14 publications

Microstructural and Mechanical Properties Analysis of Phosphate Layers Deposited on Steel Rebars for Civil Constructions

Microstructural and Mechanical Properties Analysis of Phosphate Layers Deposited on Steel Rebars for Civil Constructions

Crystal Structure and Properties of Zinc Phosphate Layers on Aluminum and Steel Alloy Surfaces

Effect of Chromium Content in the Steel Substrate on the Coating Formation and Tribological Properties of Manganese Phosphate Coatings

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