Manganese Phosphating of Gears and Surface Roughness Consequence

Westberg, Henrik; Nilsson, Per H.; Rosén, Bengt-Göran; Stenbom, Bertil

doi:10.1016/s0167-8922(00)80120-0

Cited by 7 publications

(6 citation statements)

References 2 publications

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“…There are many various types and processes of metal coating, which means that there are also many types of methods used for anticorrosion protection of metal. The methods include the conversion coating of metal with manganese phosphate [1][2][3][4][5][6][7]. During manganese phosphating, the steel product is submerged in a solution containing phosphoric (V) acid, nitric (V) acid and inorganic manganese and nickel compounds as well as organic phosphating accelerators containing NO 2 − nitro groups, e.g., nitro derivatives of benzene or nitro-compounds derived from guanidine [8].…”

Section: Introductionmentioning

confidence: 99%

Modified Manganese Phosphate Conversion Coating on Low-Carbon Steel

et al. 2020

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Conversion coatings are one of the primary types of galvanic coatings used to protect steel structures against corrosion. They are created through chemical reactions between the metal surface and the environment of the phosphating. This paper investigates the impact that the addition of new metal cations to the phosphating reaction environment has on the quality of the final coating. So far, standard phosphate coatings have contained only one primary element, such as zinc in the case of zinc coatings, or two elements, such as manganese and iron in the case of manganese coatings. The structural properties have been determined using a scanning electron microscope (SEM), X-ray diffraction (XRD), and electrochemical tests. New manganese coatings were produced through a reaction between the modified phosphating bath and the metal (Ba, Zn, Cd, Mo, Cu, Ce, Sr, and Ca). This change was noticeable in the structure of the produced manganese phosphate crystallites. A destructive effect of molybdenum and chromium was demonstrated. Microscopic analysis, XRD analysis and electrochemical tests suggest that the addition of new metal cations to the phosphating bath affects the corrosion resistance of the modified coating.

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Section: Introductionmentioning

confidence: 99%

Modified Manganese Phosphate Conversion Coating on Low-Carbon Steel

et al. 2020

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“…Phosphate coatings are the most often used form of steel surface treatment due to the reasons which include their good adhesion, high corrosion resistance, improved abrasive resistance of the structure, and acceptable costs of the manufacturing [1,2,3,4]. Corrosion protection for steel could be achieved by the application of modified phosphate [2,3,4], zinc phosphate [5,6,7,8,9,10,11,12,13,14,15,16,17,18], iron phosphate [19,20,21], as well as manganese phosphate coatings [22,23,24,25,26,27,28,29,30]. It was found that, of the above-mentioned phosphate coatings, the manganese phosphate coatings have the highest hardness in addition to their remarkable corrosion and wear resistance [30].…”

Section: Introductionmentioning

confidence: 99%

“…Another well-known approach requires the introduction of organic compounds, i.e., benzotriazoles [9] or tolytriazoles, leading to the reduction of the crystals’ diameter (ca 4.5 ± 2 µm) until an increased surface is finally obtained [39]. A number of other modifications that concern the replacement of the nickel cation [25,31] by copper [36] or molybdenum compounds are considered as an alternative [35]. Moreover, the addition of a zirconium compound such as zirconium hexafluoride acid (H 2 ZrF 6 ) [43], a titanium compound like titanium hexafluoride acid (H 2 TiF 6 ) [43,44,45], or silicon compound such as silicon hexafluoride acid (H 2 SiF 6 ) [35,38] to the phosphating bath, was reported to be an alternative to the traditional electrolyte composition.…”

Section: Introductionmentioning

confidence: 99%

Manganese Phosphatizing Coatings: The Effects of Preparation Conditions on Surface Properties

et al. 2018

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Manganese phosphate coating could be used to protect the surface of steel products. However, it is essential to determine the effects which process parameters, as well as the types of additives used, have on the efficiency of coating deposition. Thus, we present here a process of phosphatization of low-alloy steel (for 15 min at 95 °C) in manganese/nickel baths followed by a passivation process with the use of a silicon and zircon compounds. The microstructure and morphology of the surface were analyzed by SEM EDX and XRD methods. The obtained results showed that the manganese phosphate could be effectively formed at 95 °C in the solution containing nickel and guanidine derivatives. Anodic polarization of manganese coating was investigated in 0.5 M KCl by the analysis of polarization resistance. The effects of the activation process on corrosion properties of the coating have been examined. It was observed that an increased concentration of activating substances in the activation bath results in the enhancement of corrosion resistance.

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“…Furthermore, because of the properties mentioned it can also serve as a base layer for paint and organic coatings [69,72,73]. In tribology these properties make them ideal to facilitate the running-in phase of machine elements like gears [74].…”

Section: Phosphate Conversion Coatingsmentioning

confidence: 99%

Running-in of metal-to-metal seals and its influence on sealing ability with application to the design of biodegradable thread compounds

Ernens¹

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Manganese Phosphating of Gears and Surface Roughness Consequence

Cited by 7 publications

References 2 publications

Modified Manganese Phosphate Conversion Coating on Low-Carbon Steel

Modified Manganese Phosphate Conversion Coating on Low-Carbon Steel

Manganese Phosphatizing Coatings: The Effects of Preparation Conditions on Surface Properties

Running-in of metal-to-metal seals and its influence on sealing ability with application to the design of biodegradable thread compounds

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