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Three recent international pipeline projects illustrate that the typical surface profile height and abrasive blast cleaning requirements in today’s coating standards and specifications have not been sufficient to define the adequate level of the abrasive blasting.
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Coatings have been used as a primary method to protect the substrate underneath from corrosion in various geographical environments. A diverse range of generic coating types are available to protect the metals in different corrosive environments. Selection of the right coating for a specific metallic substrate at given operating conditions and environment is key to avoiding any premature failures of coating.
Throughout both commercial and military industries there is a growing need for environmentally safe and cost-effective solutions capable of removing paint and coatings from a wide range of surfaces including steel, aluminum, concrete, and composites. Atmospheric Plasma Coating Removal (APCR) is the next generation of coating removal and surface preparation technology that represents a step forward in developing more environmentally responsible methods for coating removal.
Traditional zinc rich primers are the primer of choice during new construction of assets placed offshore for oil & gas production. However, during maintenance, zinc rich primers are not used because of difficulties of having good surface preparation and controlling applied dft to prevent cracking. This paper will examine the performance of new, activated zinc rich epoxy primers compared to conventional zinc rich epoxy primers on steel prepared to different surface profiles using standard techniques of today.
This paper will discuss various considerations that should be weighed when writing a specification to line a concrete tank, secondary containment or industrial floor.
An NSRP-sponsored project investigating the cost of coatings QA suggested that current QA/QC processes have a high tendency to lead to conflict. Survey data collected during the project indicates that one in 20 inspection checkpoints is likely to result in a dispute. Some of these disputes may simply arise from the expected variability in standard coating QA test methods. Data regarding the reproducibility of coating QA measurements is generally not well understood and, in some cases non-existent. The paper will discuss the reproducibility of various measurements used in the industrial protective coatings industry.
Successful repair material and coating applications are dependent on proper concrete surface preparation where different technologies and methods must be reviewed and characterized, as well as quality control methods used to increase the successful application of materials applied to existing concrete surfaces.
Many modern electronic gauges have the capability for transmitting or uploading data to a computer via a data port. This can mean transferring the data to a spreadsheet for customized analysis or to a data management software package for analysis using standard statistical methods. This paper describes the format of the data for a range of gauges used for the coating inspection process including surface profile determination, climatic condition monitoring and coating thickness measurement.
Protective coating systems provide the primary corrosion protection for assets in sea water. Protective coating systems are defined as a specific combination of surface preparation and coating material applied under specified conditions to a specific structure. Over the past many years, the paint industry has focused considerable resources toward the formulation, performance testing and fine tuning of coatings materials.
In this study, a new portable garnet blasting unit targets for weld joints in W.B.T. was developed. The field data clearly indicated that the potable garnet blasting method can be a valuable tool for small damaged area and weld seam in confined area with increase in the blasting productivity by 20%. In order to predict and optimize the pressure drop and air consumption in air blasting system, semi-empirical equations have been developed
Coating performance and longevity is highly dependent on the quality of substrate surface preparation. The effect of profile height, profile type (e.g., type of tool used to perform the prep, angularity of profile, etc.), extent of cleanliness, and amount of chloride contamination on coating performance were all studied to determine the correlation between these factors in an attempt to identify the primary factor in coating failure due to improper surface preparation.
Inspection of coating applications is more efficient and effective by the use of electronic equipment, which can store, transmit, and populate inspection reports with data. Field collection of inspection data points by manual note taking is being replaced with instruments that can capture and record metal thickness, coating film thickness, surface profile depth, surface contamination, environmental conditions, gloss levels of coatings, and adhesive pull-off strength of coatings. Electronic collection of data produces more accurately and statistically complete information than manual collection.