Selected Coating Properties of Black Alder Wood as a Function of Surface Preparation, Varnish Type, Coating System and Exposure Conditions

2022 ◽  
pp. 69-90
Author(s):  
Emilia-Adela Salca
Keyword(s):  
Surface Preparation ◽  
Coating System ◽  
Coating Properties ◽  
Black Alder ◽  
Exposure Conditions

An Experimental and Finite Element Modeling Approach to Determining Degradation of Aircraft Coating Systems

2020 ◽  
Author(s):  
Steve Policastro ◽  
Erick Iezzi ◽  
Carlos Hangarter ◽  
Rachel Anderson ◽  
Attilio Arcari ◽  
...  
Keyword(s):  
Electrochemical Impedance ◽  
Environmental Parameters ◽  
Barrier Properties ◽  
Organic Coating ◽  
Coating System ◽  
Coating Properties ◽  
Surface Pretreatment ◽  
System Properties ◽  
Service Environments ◽  
Paint Removal

In order to delay the onset of corrosion structures subjected to atmospheric degradation, such as aircraft, exterior metal surfaces are frequently covered in a corrosion prevention organic coating system. Organic coating systems, in many cases, provide a reservoir of corrosion inhibitors along with establishing a critical electrolyte barrier between the atmosphere and the structure. These coating systems include a surface pretreatment, a primer barrier layer that can contain a sacrificial inhibitor additive, and a topcoat that also provides corrosion barrier properties and other additives for color. Improving our understanding, and modeling how these coating properties change, as a function of exposure to a variety of service environments can decrease maintenance costs associated with paint removal, and re-painting. A model that can incorporate the fundamental effects of various environmental parameters can provide damage predictions based upon the measured environmental data.To that end, the initial phase of this program has focused on testing and monitoring a US Navy aircraft coating system, exposed to a variety of degradation conditions that simulate the extreme ranges of environmental stresses expected to be seen in-service. Coating condition was monitored using electrochemical impedance spectroscopy (EIS) and characterized using equivalent-circuit models so that changes to the coating system properties could be quantified and tracked over time.

Tar-Polyurethane Joint Coating for the Three-Layer Polyethylene Pipeline Coating

1996 ◽  
Author(s):  
Robert H. Rogers
Keyword(s):  
Cathodic Protection ◽  
Surface Preparation ◽  
Spray Coating ◽  
Field Trials ◽  
Localized Corrosion ◽  
Preparation Technique ◽  
Coating System ◽  
Actual Field ◽  
History Of Use ◽  
Key Steps

This article describes a new joint coating system implemented by Bechtel for a major international, 48 inch diameter gas pipeline. Despite the long history of use as a pipe and valve coating, the new implementation is the industry’s first significant use of a thermoset hot spray coating applied to field weld areas of pipe, mill coated with a three layer polyethylene system. In the laboratory and in field trials, the coating demonstrated integrity, was applied much quicker than the traditional heat shrink sleeve, and eliminated several application contingencies. Laboratory investigations undertaken in Houston, Texas and Lyon, France were key steps in selecting the 100% solids tar-polyurethane coating. Additionally, the testing assisted in developing the surface preparation technique, and demonstrating the coating’s ability to adhere to the polyethylene coating as well as the steel pipe. Serious localized corrosion, and cathodic protection shielding associated with other joint coatings are less probable with the new joint coating system. Actual field cathodic protection testing indicated very low current consumption for the completed pipeline. The efficient joint coating operation contributed to setting new construction records.

Effect of substrate surface preparation on cold sprayed Al-Zn-Al2O3 composite coating properties

2019 ◽  
Vol 61 (8) ◽  
pp. 755-758
Author(s):  
Ayça Demirer Kahraman ◽  
Fatih Kahraman ◽  
Osman Çulha
Keyword(s):  
Composite Coating ◽  
Substrate Surface ◽  
Surface Preparation ◽  
Coating Properties ◽  
Al2o3 Composite

No Pipe Body Downgrades - Improved Corrosion Mitigation Coating System Provides Significant Operator Savings

2021 ◽  
Author(s):  
Buck Johnson ◽  
Timothy Cappel ◽  
Greg Elliott ◽  
Leianne Sanclemente ◽  
Greg Moore ◽  
...  
Keyword(s):  
Surface Preparation ◽  
Field Trials ◽  
Development Effort ◽  
Coating System ◽  
Preparation Methods ◽  
Coating Application ◽  
Repair Costs ◽  
Testing Field ◽  
Operational Issues ◽  
External Coating

Abstract Objectives/Scope Tubulars used in completion and intervention riser applications are exposed to both the marine environment and corrosive oilfield chemicals, including salt-based completion brines. Eight years of field history from one company shows a loss of $24.3 million from pipe body downgrades due to corrosion and pitting in these salt-based environments. Methods, Procedures, Process This paper documents an extensive development effort spanning over eight years including: research of completion parameters and environments, evaluation of 18 potential external coating/salt neutralization products, multiple lab tests, field trials, as well as testing surface preparation methods, coating application, dry time and adhesion tests. The development of application procedures and construction of an external coating facility are discussed as are rig pipe washing systems and corrosion mitigation procedures. Results, Observations, Conclusions The result is an improved corrosion mitigation coating system. A modified epoxy phenolic internal coating combined with a metallic-based, moisture-cure polyurethane encapsulating external coating. Since 2015, over 1,700,000 feet, 44,000 joints, of completion and intervention tubulars utilizing this system have been deployed with zero pipe body downgrades due to corrosion or pitting, and zero operational issues. In addition to reducing replacement cost and loss of capital, this system provides the ability for longer deployment of the pipe on a multiple well program reducing logistics costs. Novel/Additive Information Extensive research, testing, field trials, and successful field deployments have resulted in an improved corrosion mitigation coating system providing significant savings to operators. Pipe body downgrades due to pitting and corrosion have been eliminated. Improved corrosion resistance has allowed multiple-well deployments reducing shipping, inspection, and repair costs. Ultimately this results in longer life of the tubulars reducing total cost of ownership.

scholarly journals Some Coating Properties of Black Alder Wood as a Function of Varnish Type and Application Method

BioResources ◽  
2016 ◽  
Vol 11 (3) ◽  
Author(s):  
Emilia-Adela Salca ◽  
Tomasz Krystofiak ◽  
Barbara Lis ◽  
Bartłomiej Mazela ◽  
Stanisław Proszyk
Keyword(s):  
Coating Properties ◽  
Black Alder ◽  
Application Method

scholarly journals Atmospheric resistance coating systems for shipboard yard

2021 ◽  
pp. 75-78
Author(s):  
Е.И. Пласкеева ◽  
Д.А. Полянская ◽  
В.И. Трусов ◽  
Р.С. Ходжаев ◽  
Г.В. Черкаев
Keyword(s):  
Surface Preparation ◽  
Water Soluble ◽  
Residual Water ◽  
Coating System ◽  
Metal Structures ◽  
Chemical Surface ◽  
Standard Operation ◽  
Additional Processing ◽  
The Subject ◽  
First Time

Предметом исследования является фосфатирующий состав «НОТЕХ». Это цинкфосфатный водный материал с неорганическими ингибиторами коррозии анодного типа, которые эффективно подавляют развитие подпленочной коррозии под слоем грунта. Механизм действия и исследования эффективности подавления коррозии фосфатирующего состава «НОТЕХ» проводилась с отечественными лакокрасочными материалами типа грунта ЭФ-065 и эмали ЭП-1236. Цель работы – обоснование системы покрытия с химической подготовкой поверхности под окраску. Предложена универсальная атмосферостойкая система лакокрасочного покрытия повышенной надежности и долговечности для защиты береговых металлических сооружений, конструкций и оборудования судостроительной верфи. Впервые методами кондуктометрии, рН-метрии и измерения адгезии показана совместимость «НОТЕХ» с алкидным грунтом Pilot QD Primer компании JOTUN и соответствие требованиям стандартов ISO по содержанию остаточных водорастворимых веществ перед окраской. При этом дополнительная обработка поверхности «НОТЕХ» после абразивоструйной очистки до степени Sa2,5 не ухудшает адгезию покрытия, а также допустима нестандартная операция преобразования продуктов вторичной (вспышечной) коррозии после очистки абразивом без их удаления. The subject of the study is the phosphating composition «НОТЕХ». It is a zinc phosphate aqueous material with inorganic anode-type corrosion inhibitors that effectively suppress the development of sub-film corrosion under a layer of soil. The mechanism of action and research on the effectiveness of corrosion suppression of the phosphating compound «НОТЕХ» was carried out with domestic paints and varnishes such as soil ЭФ-065 and enamel ЭП-1236. The purpose of the work is to substantiate a coating system with chemical surface preparation for painting. A universal weather-resistant paint and varnish coating system of increased reliability and durability for the protection of coastal metal structures, structures and equipment of a shipyard is proposed. For the first time, conductometry, pH and adhesion measurements have demonstrated the compatibility of «НОТЕХ» with JOTUN's Pilot QD Primer alkyd soil and compliance with ISO standards for residual water-soluble substances before painting. Moreover, additional processing of the «НОТЕХ» surface after abrasive blast cleaning to the degree of Sa2.5 does not impair the adhesion of the coating, and a non-standard operation of converting secondary (flash) corrosion products after abrasive cleaning without removing them is also acceptable.

Thermal Benefits of Low Solar Absorption Coating for Preventing Rail Buckling

2015 ◽  
Author(s):  
Hao Wang ◽  
Jiaqi Chen ◽  
P. N. Balaguru ◽  
Leith Al-Nazer
Keyword(s):  
Thermal Stresses ◽  
Three Dimensional ◽  
Surface Preparation ◽  
Organic Content ◽  
Coating System ◽  
Solar Absorption ◽  
Coating Application ◽  
Dimensional Finite Element ◽  
Hot Weather ◽  
Three Dimensional Finite Element

A low solar absorption coating for rail application is developed to reduce the peak rail temperature and buckling risk in summer months. The proposed coating system provides a highly reflective surface through white or off-white color and has constituents to provide high abrasion resistance and self-cleaning properties. The zero volatile organic content (VOC) and one hundred percent inorganic coating system has excellent adhesion to steel surfaces with minimal surface preparation. This paper presented the outdoor temperature monitoring results of the coated rail segments under hot weather. The results show that the application of coating could significantly reduce the peak rail temperature up to 10.5°C. Three-dimensional finite element (FE) models were developed to predict temperature distributions and thermal stresses in the rail. The thermal stress simulation shows that, when the rail neutral temperature (RNT) is relatively low, rail coating decreases the compressive stress in the rail up to about 50% during the hottest hours. Although increasing the RNT decreases compressive thermal stresses in the rail, it could increase the risk of rail break due to the increased tensile stresses in the rail. The coating application could reduce the high RNT requirement during rail placement and prevent rail buckling as the effective RNT decreases after traffic and maintenance. Therefore, the low solar absorption coating could serve as a proactive way to control peak temperatures and thermal stresses in the rail.

A Novel Insight into Slurry Erosion Performance of Some Nickel, Alumina, and Titania Based Thermal Spray Coatings: A Review

2018 ◽  
Vol 6 (7) ◽  
pp. 90 ◽  
Author(s):  
Rajeev Kumar ◽  
Sanjeev Bhandari ◽  
Atul Goyal
Keyword(s):  
Thermal Spray ◽  
Thermal Spray Coatings ◽  
Coating System ◽  
Coating Properties ◽  
Slurry Erosion ◽  
Coating Materials ◽  
Coating Performance ◽  
Spray Coatings ◽  
The Past ◽  
Insight Into

An ideal coating system is generally considered as an appropriate combination of significant hardness and toughness. In the past investigations, the potential of various hard phases, as well as tougher candidates have been already explored. Some of these works related to slurry erosion, using nickel, alumina and titania as a coating candidate has been reviewed in the present study. The study is aiming towards investigating the effect of these coating candidates on the slurry erosion performance of a coating system. The review revealed a significant improvement in the coating properties (mechanical and microstructural) as well as coating performance with the application of the investigated coating materials.

scholarly journals Comparison of the Tribological Properties of the Thermal Diffusion Zinc Coating to the Classic and Heat Treated Hot-Dip Zinc Coatings

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1655
Author(s):  
Dariusz Jędrzejczyk ◽  
Wojciech Skotnicki
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Thermal Diffusion ◽  
Zinc Coating ◽  
Surface Preparation ◽  
Coating Properties ◽  
Basis Metal ◽  
Heat Treated ◽  
Pin On Disc ◽  
Zinc Coatings

The presented studies are focused on the wear resistance and friction coefficient changes of the thermal diffusion (TD) zinc coating deposited on steel. The aim of research was to evaluate the variation in coating properties during dry friction as a result of the method of preparation of the basis metal. The measured properties were compared to those obtained after classic hot-dip (HD) zinc galvanizing—heat treated and untreated. Thermal diffusion zinc coatings were deposited in industrial conditions (according to EN ISO 17668:2016-04) on disc-shaped samples. The results obtained during the tribological tests (T11 pin-on-disc tester) were analysed on the basis of microscopic observations (with the use of optical and scanning microscopy), EDS (point and linear) analysis and microhardness measurements. The obtained results were similar to effects observed after heat treatment of HD zinc coating. The conducted analysis proved that the method of initial steel surface preparation results in changes in the coating’s hardness, friction coefficient and wear resistance.

Sign in / Sign up

Export Citation Format

Share Document