Surface Analysis of Carbon Steel Protected from Corrosion by a New Ternary Inhibitor Formulation Containing Phosphonated Glycine, Zn&amp;lt;sup&amp;gt;2+&amp;lt;/sup&amp;gt; and Citrate

Rao, B. V. Appa; Rao, Mala; Rao, Sirugudu Srinivasa; Sreedhar, B.

doi:10.4236/jsemat.2013.31005

Cited by 4 publications

(3 citation statements)

References 65 publications

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“…The presence of phosphate groups on the surface is evidenced by the peak at 133.1 eV in accordance with the literature. 31 The P 2p peak has closely spaced spin−orbit components (Δ = 0.87 eV), and a broad peak can be observed because of an overlap of P 2p 1/2 and P 2p 3/2 signals, characteristic for phosphate species.…”

Section: Resultsmentioning

confidence: 99%

Metal–Phosphate Bilayers for Anatase Surface Modification

Monteiro

Cha

Schmuki

et al. 2018

ACS Appl. Mater. Interfaces

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Compared to many other metal oxides, anatase TiO shows relatively lower reactivity toward carboxylic acid anchor groups. The latter is crucial for applications, for example, in dye-sensitized solar cells (DSSCs), where the most used dyes bind to the metal oxide surface through carboxylic acid terminations. To improve the surface reactivity, metal-phosphate bilayers of Ni or Co were synthesized on anatase TiO compact oxide and nanotubes. In both cases, time-of-flight secondary ion mass spectrometry (ToF-SIMS) and X-ray photoelectron spectroscopy (XPS) results showed that the bilayers were successfully formed and that the phosphate layer works as an intermediate between TiO and the other species. ToF-SIMS depth profiles of modified nanotubes showed that Ni and Co are present through the whole tube length and reduce in content after heat treatment, in agreement with XPS results. Phosphate groups, on the other hand, are more present in the tubes' depth, and their content on the surface is reduced upon exposure to temperature. The reactivity of the modified surfaces toward carboxylic acid-terminated molecules, as stearic acid and Ru-based N719 dye, was evaluated. Contact angle measurements together with dye desorption experiments demonstrated that the Co-phosphate bilayers heat-treated at 300 °C resulted in the largest enhancement compared to the reference. Bilayer-modified compact anatase TiO and anatase TiO nanotubes were utilized as photoanodes in DSSCs. An increase in efficiency was observed for all modified electrodes with phosphate-Co treatment, leading to the highest J values and an efficiency improvement of 48%.

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Section: Resultsmentioning

confidence: 99%

Metal–Phosphate Bilayers for Anatase Surface Modification

Monteiro

Cha

Schmuki

et al. 2018

ACS Appl. Mater. Interfaces

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“…It is well known that a protection film will form on the steel surface with ATMP or imidazoline introduced into the solution. [25][26][27] Amino trimethylenephosphonic acid is a kind of environment friendly inhibitor, which makes little pollution to the environment, and it also has an excellent scale inhibition effect in oil and gas pipelines. Amino trimethylenephosphonic acid can chelate with the positive ion on the steel surface to form a dense clathrate protective film for anticorrosion.…”

Section: Discussionmentioning

confidence: 99%

Novel electrical resistance method to measure underdeposit corrosion and its inhibition in pipeline steels

Huang

et al. 2016

Corrosion Engineering, Science and Technology

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In this work, the evaluation of under deposit corrosion (UDC) behaviour of X65 pipeline steel and its inhibition in oxygen corrosion conditions were studied. In the fundamental experimental study, a three-electrode electrochemical system was used to measure the corrosion rates and polarisation curves by linear polarisation resistance and potentiodynamic polarisation methods. The galvanic effect caused by the deposit was also studied by the zero resistance ammeter technique. An 8 in X65 pipeline internal corrosion monitoring system based on the ring pair electrical resistance sensor (RPERS) was established for further research of UDC. The underdeposit corrosion rate and its inhibitory effect in the pipeline were also monitored by RPERS. Electrochemical test results showed that the corrosion inhibitor amino trimethylenephosphonic acid (ATMP) would result an accelerate corrosion for UDC. A nearly 1.7 times increase was found on the galvanic current when ATMP was introduced into the solution. The inhibitor imidazoline had a good performance on UDC for both corrosion inhibiting and the reduction of the galvanic current. Through the monitoring results of RPERS, the UDC status in the pipeline and the effect of the inhibitors were studied. The monitoring results have a consistency with the fundamental experiment.

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“…It has already been basically discussed above. The second way to increase the efficiency of phosphonate CIs and reduce their protective concentration is to use them in combination with nontoxic and economically available nonoxidative additives, for example, water-soluble polymers, adsorption CIs, or complexing reagents [171][172][173].…”

Section: Phosphonic Acids and Phosphonatesmentioning

confidence: 99%

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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Surface Analysis of Carbon Steel Protected from Corrosion by a New Ternary Inhibitor Formulation Containing Phosphonated Glycine, Zn<sup>2+</sup> and Citrate

Cited by 4 publications

References 65 publications

Metal–Phosphate Bilayers for Anatase Surface Modification

Metal–Phosphate Bilayers for Anatase Surface Modification

Novel electrical resistance method to measure underdeposit corrosion and its inhibition in pipeline steels

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

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