Industrial Surface Chemistry

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5 Ways to Avoid Galvanic Corrosion

According to Corrosionpedia: Galvanic corrosion (also called bimetallic corrosion or dissimilar metal corrosion) is a deteriorative electrochemical process that occurs when two dissimilar metals are in contact with each other in the presence of an electrolyte. This type of corrosion is characterized by the accelerated corrosion of one metal, while the other remains mostly unaffected. In other words, one metal becomes the anode and corrodes preferentially, thus sacrificing itself while protecting the other metal, the cathode. Galvanic corrosion is relatively aggressive and causes millions of dollars in damage annually. Countermeasures to prevent its formation must be taken into consideration at ...

Important Advice You Need To Know For Proper Surface Treatment

According to The Clinton Courier: Surface treatment is the process of changing the molecular makeup of a surface so that it interacts with an adhesive ink, coating, paint, or another surface to form a strong bond. Surface treatments come in a variety of styles. Hard chrome plated layers have traditionally been used. Meanwhile, modern techniques such as laser cladding have emerged. he key motivation for applying surface treatment is to improve protection against any corrosion or wear and tear on any part of machinery until it is finally assembled. The three-part method, which involves corona, rotor spray, and drying technology, ...

Phosphate Conversion Coatings

According to Products Finishing: Convert: To change into another form, substance or state. In the case of phosphate conversion coatings, the substrate metal participates in the coating reaction and becomes a component of the coating. Phosphate conversion coatings are formed from the surface of the base metal outward. Therefore, the thickness of the coating is dependent upon the porosity of the coating as it forms. Once the surface is sealed from the chemical solution, the reaction stops. Phosphate conversion coatings are an integral part of most finishing operations, serving one or more of the following functions: increase corrosion resistance, absorb ...

The Process Of Phosphating – Some FAQs

According to Engineering Review: Q. What Is the phosphating Process? Phosphating is the process of converting a steel surface to iron phosphate. This is mostly used as a pretreatment method in conjunction with another method of corrosion protection. A layer of phosphate coating typically includes iron, zinc or manganese crystals. Phosphating is a chemical process for treating the surface of steel, where barely soluble metal-phosphate layers are formed on the base material. The layers created are porous, absorbent and suitable as a conversion layer for subsequent powder coating without further treatment. Q. Why is phosphating done? The process of Phosphate ...

Role of Lubrication during the Process of Metal Working

According to Ispat Guru: Role of Lubrication during the Process of Metal Working For understanding the role of lubrication during the processes of metal working, it is important to know the tribology of the lubrication. Tribology consists of boundary friction, which is associated with almost all operations of the metal working. It is caused by the relative movement of two adjacent surfaces under pressure. During the metal working processes, the relative movement between rolls and work piece is improved by the surface speed differential of the rolls Friction Friction plays an important role during metal working process. It is defined ...

Surface Chemistry

According to Chemistry Page: Surface chemistry is a discipline about the physical and chemical properties of solid and liquid surfaces or phase interfaces. Its contents include, for example, the adsorption and segregation of solutes on the solution surface, the infiltration of liquids on solid surfaces, and the adsorption of gases on solid surfaces, which are closely related to the actual production. Early surface chemistry studies were mainly phenomenological descriptions of related surface or interface properties. Since the 1960s, due to the need for further development of some important technical fields related to solid surfaces, such as solid materials, devices, heterogeneous catalysis, ...
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