Industrial Surface Chemistry

Industry News

Industry News

The 8 Most Common Forms of Metal Corrosion

Corrosion is defined as the deterioration of a material as a result of chemical reactions between it and the surrounding environment. Although corrosion affects a variety of materials including polymers and ceramics, the term is most often associated with the degradation of metals. In a 2016 study conducted by the NACE (formerly known as the National Association of Corrosion Engineers) and outlined in their publication “The International Measures of Prevention, Application and Economics of Corrosion Technology (IMPACT),” corrosion incurs a global cost of $US 2.5 trillion dollars. This figure represents roughly 3.4 percent of the global Gross Domestic Product (GDP) ...

Improving Transfer Efficiencies in Coating Operations

Q: How do I improve transfer efficiency in my spray operation? A: There are several factors that impact transfer efficiency, including the spray equipment being used — both air and fluid pressure — as well as ambient temperature, humidity and moving air in the paint area. Additional factors include the actual shape and size of the paint target, and the spray finishing methods, including atomization and the individual or robots operating the spray applicator. Finally, the electrical conditions of the applicator, paint material, metal target and holding fixture/carrier is very important and impacts both the paint transfer efficiency and the ...

Basic Facts in Metal Cleaning

Preparation for processing it for application 0f a non-metallic zinc phosphate for either corrosion protection or painting In metal cleaning it is generally overlooked that water plays the most important part. Its condition (hard or soft), and degrees thereof determines the performance of the chemicals dissolved in it. The efficiency of any cleaner is directly proportional to how if performs in water. The chemical must do three important things. First, it must tie-up or inactivate hard water ions for better rinsing and cleaning. Second, it must lower the surface tension of the water— in effect, it makes water wetter. Third, ...

Cleaning Stainless Steel

Stainless steels are highly corrosion resistant—however, stainless steel applications can still remain at risk to surface damage. Oxidation, corrosion, rusting, or staining can occur over the long-term in harsh environments without routine cleaning and maintenance. Repeat mechanical damage also contributes to a faster degradation of the metal. All stainless steels contain at least 10.5% chromium by weight. It is this chromium content that creates a shield called the passive layer, which protects stainless steel from corrosion—unlike other steels. The higher the chromium content, the greater the corrosion resistance. Stainless steel rusting occurs when the passive layer is damaged and there ...

SELECTION OF WEAR COATINGS AND TREATMENTS FOR MAXIMUM ACHIEVABLE RELIABILITY

The selection of the proper coatings and treatments to be used for a wear resistant job is the most important step in doing the job successfully. Each wear coating has different characteristics of strength, shrinkage, hardness, and other qualities, such that there is a material for every wear resistant category. There are two general material approaches to wear resistance. Firstly, wear resistant material can be used as a material that resists wear by virtue of its composition or its properties. Secondly, as a structural part material that can be used, while its surface is modified by treatments and coatings to ...

Guidelines for Choosing a Metal Parts Cleaning Method

Today, most metal fabricators and machine shops have two parts-cleaning options: aqueous water-based cleaning or solvent-based cleaning inside a vapor degreaser. Both methods can provide quality cleaning results. However, each has its distinct drawbacks and advantages. Aqueous or water cleaning is a process that uses water and chemical additives to get parts clean. The water is treated with detergents or surfactants, builders, emulsifiers, saponifers, sequestering agents, chelating agents and a variety of other compounds to boost the cleaning performance. Using a three-step process, parts are washed in a series of machines, followed by a secondary rinse step to carry away ...
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