Excellent tribological behavior of hexadecylphosphonic acid films formed on titanium alloy

Zhang, Caixia; Liu, Yuhong; Wen, Shizhu

doi:10.1007/s11431-014-5572-7

Cited by 6 publications

(3 citation statements)

References 32 publications

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“…In addition, as noted by some researchers, SAMs formed by C n PAs are more strongly bound to an oxidized metal surface and are characterized by higher density, ordering and stability compared to SAMs formed from higher carboxylic acids or silanes [272,281,282]. These specific features of higher C n PAs, along with low toxicity, allow them to be used as efficient and environmentally friendly surface modifiers of materials and as OCIs [283][284][285][286]. However, their use in aqueous solutions is difficult due to their low solubility.…”

Section: Phosphonic Acids and Phosphonatesmentioning

confidence: 91%

Thin Protective Coatings on Metals Formed by Organic Corrosion Inhibitors in Neutral Media

Kuznetsov

Redkina

2022

Coatings

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Protection of metals in neutral media with pH 5.0–9.0 (in humid atmospheres and various aqueous solutions) can be achieved by formation of thin coatings (up to several tens of nm) on their surfaces due to adsorption and more complex chemical interactions of organic corrosion inhibitors (OCIs) with the metal to be protected. The review contains three sections. The first section deals with coatings formed in aqueous solutions, while the second one, with those formed in organic and water-organic solvents. Here we consider metal protection by coatings mainly formed by the best-known classes of OCI (carboxylates, organophosphates and phosphonates) and estimation of its efficiency. The third section discusses the peculiarities of protection of metals in the vapor-gas phase, i.e., by volatile OCIs, and a relatively new type of metal protection against atmospheric corrosion by the so-called chamber inhibitors. OCIs with relatively low volatility under normal conditions can be used as chamber OCIs. To obtain a protective coating on the surfaces of metal items, they are placed in a chamber inside which an increased concentration of vapors of a chamber OCI is maintained by increasing the temperature. This review mainly focuses on the protection of iron, steels, copper and zinc.

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Section: Phosphonic Acids and Phosphonatesmentioning

confidence: 91%

Thin Protective Coatings on Metals Formed by Organic Corrosion Inhibitors in Neutral Media

Kuznetsov

Redkina

2022

Coatings

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“…Raman et al [7] studied their ability to create a Self-Assembled-Monolayer (SAM) on the surface of an oxidized austenitic stainless steel (316L). In more recent studies [8,9,10,11,12], significant improvement of the tribological behaviour of different substrates (copper, titanium, stainless steels) was demonstrated and assigned to alkylphosphonic acids molecules used as nano-size liquid additives in lubricant, highlighting more especially the formation of low-friction tribofilm during sliding, responsible for the surface protection, Figure 1. The development of a water-based lubricant containing alkylphosphonic acids is now in progress, and the efficiency of grafted tribofilms obtained from fluid additive reaction with metallic parts concerned by the cutting process (part and tool), has to be validated.…”

Section: Introductionmentioning

confidence: 99%

Test of a New Water-Based Lubricant in Turning of 316L Stainless Steel

Rahn

Gilbin

Fontaine

et al. 2022

DDF

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In recent years, hybrid manufacturing combining additive and subtractive processes is gaining increasingly importance in the industry. One of the issues related to this association of processes concerns the use of cutting fluids, important to optimize the machining part, but that can strongly affect the additive part by generating pores in the laser metal deposition. The present work deals with the performance of a new ecological cutting fluid that dries just as water, eliminating the need for a cleaning step between the machining and the laser metal deposition. This lubricant is an emulsion mainly composed of water and alkylphosphonic acids known to allow creating a low-friction tribofilm on metals. This study is carried out by comparing the machining performance of this new cutting fluid with two more classical lubricants, a straight oil and a soluble oil. It was found that machining forces and surface roughness were not very affected by the change of the lubrication mode, while the tool wear showed a significant difference between the dry and the lubricated cases. Considering that the performance of all the cutting fluids was very close, it was concluded that the new lubricant has a great potential for machining applications, since it is ecologically more friendly, non-harmful to the operator and does not need a degreasing step.

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“…The responsive behavior of switching between friction and lubrication was obtained by cross-linked polyDVBAPS [29]. It is widely accepted that phosphate groups have a strong affinity to many metal surfaces, and poly(vinylphosphonic acid) (PVPA) is a kind of macromolecule, having a high density of phosphate groups on a polymer backbone [30,31]. Our previous studies showed that PVPA-modified Ti6Al4V has a stable cross-linked network structure, exhibiting superlubricity behavior and a saltresponse characteristic [17,32].…”

Section: Introductionmentioning

confidence: 99%

Regulation Mechanism for Friction Coefficient of Poly(vinylphosphoric acid) (PVPA) Superlubricity System Based on Ionic Properties

et al. 2022

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Adjustable lubrication aims to achieve active control of the relative motion of the friction interface, providing a new idea for intelligent operation. A new phenomenon of sudden changes of friction coefficient (COF) in the poly(vinylphosphoric acid) (PVPA) superlubricity system by mixing different lubricants, was found in this study. It was found that anions were the critical factor for the COF change. The change degrees of the COF were investigated by a universal micro tribometer (UMT). A quartz crystal microbalance (QCM)-D was used to analyze the adsorption quantity of anions on the PVPA surface. The hydratability of the PVPA interface was controlled by changing the anionic properties (the amount of charge and structure), thus regulating the COF. The adsorption difference of anions is an important reasoning of how anionic properties can regulate the hydratability. It was analyzed by molecular dynamics simulation. For anions carrying different numbers of charges or double bonds, the adsorption quantity of anions was mainly affected by the adsorption degree on the PVPA surface, while the adsorption quantity of anions with different molecular configuration was synergistically regulated by the adsorption degree and adsorption area of anions on the PVPA surface. This work can be used to develop smart surfaces for applications.

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Excellent tribological behavior of hexadecylphosphonic acid films formed on titanium alloy

Cited by 6 publications

References 32 publications

Thin Protective Coatings on Metals Formed by Organic Corrosion Inhibitors in Neutral Media

Thin Protective Coatings on Metals Formed by Organic Corrosion Inhibitors in Neutral Media

Test of a New Water-Based Lubricant in Turning of 316L Stainless Steel

Regulation Mechanism for Friction Coefficient of Poly(vinylphosphoric acid) (PVPA) Superlubricity System Based on Ionic Properties

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