Environmentally Friendly Tannic Acid Multilayer Coating for Reducing Corrosion of Carbon Steel

Multinuclear platinum complexes of the natural antioxidant tannic acid and its aglycone part methyl digallate can be prepared via an environmentally friendly, solvent-free process exploiting the convenient precursor [PtCO3(Me2SO-S)2].

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Anticorrosion Property of Alcohol Amine Modified Phosphoric and Tannic Acid Based Rust Converter and Its Waterborne Polymer-Based Paint for Carbon Steel

Coatings ◽

10.3390/coatings11091091 ◽

2021 ◽

Vol 11 (9) ◽

pp. 1091

Author(s):

Yang Chen ◽

Shiyu Li ◽

Zhiyong Liu ◽

Zixiao Wang

Keyword(s):

Corrosion Resistance ◽

Carbon Steel ◽

Tannic Acid ◽

Iron Phosphate ◽

Anticorrosion Property ◽

Rust Layer ◽

Passivation Film ◽

Film Layer ◽

Main Components

Four kinds of alcohol amines were tested to improve the anticorrosion performance of the phosphoric and tannic acid (PTA)-based rust converter. The alcohol amine modified PTA rust converters with the optimum mechanical and functional performances were used to prepare the homogeneous single-component waterborne rust conversion-based paint. The mechanical properties and the long-term corrosion resistance of the synthesized rust converter-based paint were investigated. The results show that alcohol amine modified PTA rust converter can convert the rust layer into a thick passivation film with iron tannate and iron phosphate as the main components, significantly improving the corrosion resistance of the carbon steel. The alcohol amine D modified PTA rust converter (RC-D) showed the best anticorrosion and rust conversion performances. The waterborne rust conversion-based paint can convert the rust layer of steel into a blue-black and relatively flat passivation film layer. The waterborne polymer-based paint containing 10 wt.% RC-D significantly improves the long-term corrosion resistance of the rusty steel and the mechanical property of paint.

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Detailed macro-/micro-scale exploration of the excellent active corrosion inhibition of a novel environmentally friendly green inhibitor for carbon steel in acidic environments

Journal of the Taiwan Institute of Chemical Engineers ◽

10.1016/j.jtice.2019.04.002 ◽

2019 ◽

Vol 100 ◽

pp. 239-261 ◽

Cited By ~ 37

Author(s):

Ali Dehghani ◽

Ghasem Bahlakeh ◽

Bahram Ramezanzadeh ◽

Mohammad Ramezanzadeh

Keyword(s):

Carbon Steel ◽

Corrosion Inhibition ◽

Environmentally Friendly ◽

Green Inhibitor ◽

Micro Scale ◽

Acidic Environments ◽

Active Corrosion

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Multilayer Coatings Using Epoxy and Superabsorbent Polymer Composite Material with Self Healing Property

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.861.202 ◽

2020 ◽

Vol 861 ◽

pp. 202-212

Author(s):

Ariel Verzosa Melendres ◽

Mel Bryan L. Espenilla ◽

Araceli M. Monsada ◽

Rolan Pepito Vera Cruz

Keyword(s):

Composite Material ◽

Sodium Chloride ◽

Carbon Steel ◽

Sea Water ◽

Multilayer Coating ◽

Steel Specimen ◽

Polymer Composite Material ◽

Superabsorbent Polymer ◽

Self Healing ◽

Healing Property

The property of superabsorbent polymer (SAP) was investigated as component of composite material for corrosion control application. The composite material is a multilayer coating consisting of SAP particles, epoxy and hardener. The absorption property of SAP at different concentrations of sodium chloride was measured. It included 3% NaCl concentration, which represent the concentration of salt in sea water, an environment which is corrosive to carbon steel. Results showed decreasing absorbency of SAP at increasing concentration of sodium chloride. Predetermined amount of SAP and epoxy were mixed to obtain a homogenous mixture after which the hardener was added and mixed homogenously to form the composite material’s main component. The composite material was studied for absorption properties in an HDPLE substrate and then later applied onto a carbon steel specimen of size 40 mm x 100 cm and thickness of 0.70 mm using paint brush forming a film on the carbon steel surface. After curing, the film was scratched with a definite length using a sharp knife. Immediately, the samples were exposed to cyclic immersion in 3% sodium chloride solution and subsequent drying to run the corrosion test. Results showed that the composite material was able to control corrosion on the surface of the carbon steel which could be attributed to its self-healing property.

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Leachates of Thermally Modified Pine (Pinus sylvestris L.) Wood

Rural Sustainability Research ◽

10.1515/plua-2015-0010 ◽

2015 ◽

Vol 34 (329) ◽

pp. 26-31 ◽

Cited By ~ 1

Author(s):

Anete Meija-Feldmane

Keyword(s):

Pinus Sylvestris ◽

Mass Loss ◽

Tannic Acid ◽

Environmentally Friendly ◽

Hazardous Substances ◽

Environmental Aspects ◽

Treatment Technology ◽

Thermally Modified Wood ◽

Main Components ◽

Modified Wood

Abstract During the last decades, thermally modified wood has become an object of interest among the wood scientists as an environmentally friendly material, because nowadays environmental aspects of materials have become more and more significant. Leaching is one of the processes that occurs in outdoor use. The aim of this study was to evaluate concentration of potentially hazardous substances in leachates of thermally modified pine wood. Scots pine (Pinus sylvestris L.) wood was thermally modified using Wood Treatment Technology (WTT) company device at 170 °C for 1 hour (TMP170/1) and at 160 °C for 3 hours (TMP160/3) and the mass loss was calculated. Material preparation and leaching procedure was made according to standard LVS EN 84:2000. In obtained leachates, the content of sugars, acetic acid, furfural and tannic acid were determined. Results showed that the total wood mass loss was 7.1 ± 1.4% (n=20) for TMP170/1 and 4.0 ± 1.6% (n=20) for TMP160/3. The initial leaching velocity differs between both modes and is higher for TMP160/3. The velocity decreases exponentially with immersion time and reaches plateau after 7th (5 days) immersion, but leaching still continues after the 9th immersion (14 days). The main components in leachates were tannic acid and pentoses. Among all studied compounds furfural is the hardest leachable one. Thermally modified wood treated at TMP170/1 is more environmentally friendly due to less water leachable substances. It is worth looking forward by investigating volatile organic compounds emissions in the air as it also could give high impact on human health.

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