Coatings Archives - Page 4 of 11

Inorganic Zinc-Rich Primers vs. Organic Zinc-Rich Primers: What’s the Difference?

7 Comments / Bridges, Coatings / Kaley Stanczyk

Before describing the difference between inorganic zinc-rich coatings and organic zinc-rich coatings, an explanation of galvanic protection is necessary. Zinc-rich coatings are used to protect steel substrates from corroding by employing some barrier protection but primarily sacrificial or cathodic protection. A corrosion cell contains four elements (oxygen is assumed to be present): anode, cathode, metallic […]

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Problem Solved: Taking Control of Preexisting Conditions

Coatings, Specifications / Ken Trimber

Specifications for maintenance painting often state that the commencement of cleaning and painting is an acknowledgment that the contractor accepts the existing building conditions as being suitable for painting and, implicitly, suitable for the performance of the paint system. As seen in Durability and Design Summer 2017 Issue This article addresses a requirement in specifications

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Specifying Coatings

Coatings, Maintenance Painting, Specifications / Bill Corbett

Part 1: Specifications Simplified Independent of the type of coating project, a properly prepared specification is a key component to its success. A coatings specification describes the project and the objective of the coating system. It also describes the surface preparation requirements, materials required to complete the work, the intended appearance of the completed work,

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Effects of Organic Solvent Exposure on Humans

Coating Application, Coatings, Health & Safety / KTA Staff

An organic solvent is a chemical that is relatively stable, in the liquid state at temperatures of approximately 0 degree to 250 degree Celsius. Common organic solvents are classified as alcohols, aromatic hydrocarbons, chlorinated hydrocarbons, aliphatic hydrocarbons, esters, glycol ethers, and ketones. Organic solvents are widely employed since they dissolve, suspend or extract other materials

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Characterizing the Service Environment when Selecting Coatings

Coatings, Specifications / Bill Corbett

One of the tasks for a specifier when selecting coating systems is to properly and thoroughly identify the prevailing service environment for existing structures/facilities, or the anticipated service environment for new structures or facilities. Stated more simply, once the coating system is installed, what will it be subjected to, under both normal and upset operating

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Paint Application – A Job for Professionals

Coatings / Ken Trimber

The coating systems applied to the exterior of commercial buildings serve two functions – to protect and to beautify. Protection of substrates from deterioration and wind-driven rain requires the meticulous application of a continuous film to all surfaces. The coatings must be applied according to the manufacturer’s instructions and within defined thickness ranges. The application

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Building a Formula for Removing Coatings from Masonry Surfaces

2 Comments / Buildings, Coatings / Ken Trimber

Frequently during the life of a building constructed of concrete masonry units (CMU) or brick, it is no longer feasible to refurbish the exterior by pressure washing and applying more coats of paint (Photo 1 below). This occurs because: The existing coating becomes too thick or too poorly adhered to support the weight and curing

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Importance of Stripe Coating for Extending Coating Service Life

2 Comments / Coating Application, Coatings / KTA Staff

Stripe Coating The Protective Coatings Glossary (SSPC 00 – 07) defines a “Stripe Coat” as: “A coat of paint applied only to edges or to welds on steel structures before or after a full coat is applied. The stripe coat is intended to give those areas sufficient film build to resist corrosion.” SSPC Paint Guide

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Coating Specification Language – What Goes Where?

Coating Standards, Coatings, Specifications / KTA Staff

What is considered a good coating specification and how is it written? Specifications are essentially a project “roadmap” that should convey the project scope of work and the requirements in a simple, clear, concise and easy to read format. A well written specification allows the reader to easily navigate, understand, and use the document. The

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Frequency of Measurements in the Coatings Industry

2 Comments / Coating Application, Coatings / Bill Corbett

The Issue There are two questions that can arise when performing in-process quality checks of surface preparation and coating application processes, or when evaluating the performance of a coating system already in service. These include, “How do I perform the tests,” and “What is the frequency required to ensure my test data is representative?” The

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