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What is a Phosphating? - Definition from Corrosionpedia

What Does Phosphating Mean? Phosphating is a conversion coating that is applied to steel or iron components, and is mostly used as a pretreatment method in conjunction with another method of corrosion protection. The process involves immersing a component in a dilute solution, which then converts the surface of the metal into a layer of microscopic phosphate crystals.

Iron Phosphate General Fact Sheet

Iron phosphate is a compound that combines phosphorous and oxygen with iron. It can kill slugs and snails when eaten. The toxicity of iron compounds like this depends on the amount of available iron. Iron is an essential mineral for plants and animals. It can be found in the environment, foods, and water.

Radioactive Material From Fertilizer Production | US EPA

Phosphate rock contains the mineral phosphorus, an ingredient used in some fertilizers to help plants grow strong roots. Phosphate rock contains small amounts of naturally-occurring radionuclides, mostly uranium and radium. When processing phosphate rock to make fertilizer, the phosphorous is removed by dissolving the rock in an acidic solution.

Phosphate Coating - an overview | ScienceDirect Topics

Manganese phosphate coatings are used for reducing wear and for improvement in the running-in of a gearbox. In the phosphating process, phosphoric acid pickles the surface and forms with Mn-ions a layer of phosphate crystals with high oil affinity. The dissolution of metal leads to pits in the surface, referred to as surface porosity.

Why phosphate? Which kind to use? - Finishing

The coating used as a paint base is not suitable for storage or use without a topcoat, mainly because of its porosity. Zinc Phosphating is the best pretreatment for high-end applications such as automotive and appliance, provided a good process is set up including the correct final rinse materials for the topcoat.

Phosphate conversion coating - Wikipedia

Phosphate conversion coating is a chemical treatment applied to steel parts that creates a thin adhering layer of iron, zinc, or manganese phosphates, to achieve corrosion resistance, lubrication, or as a foundation for subsequent coatings or painting. It is one of the most common types of conversion coating.The process is also called phosphate coating, phosphatization, phosphatizing, or ...

What is coking coal, and where is it used?

Iron Making: This process involves feeding a blast furnace with coke, iron ore, and small quantities of fluxes or minerals like limestone used to collect impurities. When the air is heated at around 1,200-degree Celsius temperature, coke is burnt to produce …

Phosphate Coating | Powder Coating Phosphate Wash ...

Best Technology offers the latest phosphating equipment lines for metal part or weldments used in various applications, including powder coating phosphate wash pre-treatment.. What is the phosphating process and why phosphate parts? Phosphating or phosphate conversion coating is a manufacturing process …

A Beginner's Guide to Phosphate Coating - WS2 Coating

A Beginner's Guide to Phosphate Coating. Phosphate coating is the crystalline coating applied on the ferrous metals to inhibit corrosion. The phosphate coating lends a gray to black appearance of the surface. In many applications phosphate coating is followed by oil coating (P & O) to improve its rusting and anti-galling properties.

Zinc Phosphate Coating - Zinc Phosphating Process Details

Zinc Phosphate Coating In most operations where the corrosion resistance of finished workpieces must be especially high, conversion coatings are applied using zinc phosphate. This approach is widely used in the wire drawing works, automotive industry and in certain sectors of …

Velocity Chemicals Powder Coating: Why A Phosphate Pre ...

Of course, this process has to be done right to be worthwhile, which is why a phosphate pre-treatment process is considered a key element of any preservation policy. A first glance, it might seem that the regular cleaning is sufficient before powder coating because it removes the oil and dirt build-up, as well as welding scale and a host of ...


Zinc phosphate is the preferred pretreatment choice in the electrocoat industry because it provides the best corrosion resistance and paint adhesion. Iron phosphating has had a long history of being the process of choice for applications where overall cost considerations override performance requirements.

Phasphoric Acid and Phosphatic Fertilizers: A Profile

impurities, it is generally used in foods or in more specialized industrial applications. Due to apparent low HAP emissions during the production process, thermal process phophoric acid will most likely not be regulated. 2.1.2 Phosphate Fertilizer Production The principal granulated phosphate fertilizers produced in the United States are

Photosynthesis Flashcards | Quizlet

aiii) Which process is the source of the ATP used in the conversion of glycerate 3-phosphate (GP) to triose phosphate (1 mark) LDR. iv) What proportion of triose phosphate molecules is converted to ribulose bisphosphate (RuBP) (1 mark) 5 out of 6.

Powder Coating Pretreatment | How To Get a Perfect Finish

Iron-Phosphate Sealer. Phosphate pretreatment is also called phosphatizing, a process that deposits a layer of metal substrate and phosphate onto the surface of the object being treated. This additional layer serves two major functions. The phosphate layer increases corrosion resistance because it forms an inert surface, protecting the metal ...


•Phosphating is a surface treatment process by which the steel surface is converted to metallic phosphate & is widely used for preparing metal surface before painting. (Thickness lies between 3 to 50 micron) •Phosphate coatings are produced by the chemical reaction of base metal with aqueous solution of

The process of phosphating - Some FAQs | ENGINEERING ...

Phosphating is a chemical process for treating the surface of steel, where barely soluble metal-phosphate layers are formed on the base material. The …

Industrial E-Coating Process - Advantages of ...

The process works according to the principle that "opposites attract." The e-coat process is divided into four distinct steps: In the first step – pretreatment – metal is cleaned and a phosphate is applied to prepare the surface for application of the e-coat. This process is essential to achieving the performance requirements desired by ...

Using Iron Phosphate To Get A Better Powder Coated Finish

Iron phosphate works well with heat, so gas fueled or electrically heated sprayers work best. These sprayers may include pressure wash, wet steam or dry steam features. A rinse/seal step is often required as part of the process to prevent streaking or chalking that can interfere with the powder coating. Spraying is often done inside a stainless ...

Phosphate Coating Problems & Solutions

Phosphate coating is a crystalline coating applied on the outside of ferrous metals to inhibit corrosion. The phosphate coating is usually gray to black color on the surface. In nearly all applications, the phosphate coating is followed by oil coating (P & O) or a corrosion inhibitor to improve its rusting and anti-galling properties.

AP-42, CH 8.9: Phosphoric Acid

8.9.2 Process Description3-5 Wet Process Acid Production - In a wet process facility (see Figure 8.9-1A and Figure 8.9-1B), phosphoric acid is produced by reacting sulfuric acid (H2SO4) with naturally occurring phosphate rock. The phosphate rock is dried, crushed, and then continuously fed into the reactor along with sulfuric acid. The ...

Zinc Phosphate: Questions and Answers | Products Finishing

The answer used ³ (greater than or equal to) when it should have used » (approximately) when referring to how much iron or zinc phosphate should be on a steel substrate. An even phosphate coating is very important in corrosion resistance, and 60 mg/sq ft …

Zinc phosphate conversion coating compositions and process ...

A process for forming a zinc phosphate coating on an aluminum substrate is provided to obtain good coverage by the coating. The coating preferably has a columnar or nodular crystal morphology and a coating weight of at least about 150 mg/ft 2.The aluminum substrate is contacted with a zinc phosphate conversion coating bath which contains: (a) from about 0.4 to 2.5 g/l zinc ion; (b) …

Phosphate Coating | Powder Coating Phosphate Wash ...

Best Technology offers the latest phosphating equipment lines for metal part or weldments used in various applications, including powder coating phosphate wash pre-treatment.. What is the phosphating process and why phosphate parts? Phosphating or phosphate conversion coating is a manufacturing process in which an acidic bath solution reacts with the metal part or weldment.

The Basics of Pre-Treatment

The Non Phosphate Movement The WHY Environmentally – The element "P" (Phosphorous) promotes Algae which deprives aquatic life of Oxygen Energy – doesn't require heat, reduces CO2 emission, lowers energy consumption and saves $$ Performance - Meets or Exceeds Salt Spray performance vs. Iron Phosphate

How phosphate is mined and processed

grains. Finally, a process called flotation is used to separate the phosphate from smaller-grained sand. In this process, the phosphate is coated with a hydrocarbon. When bubbles move through the liquid, the coated particles attach to the bubbles and rise to the surface.

Manganese & Zinc Phosphate Coating Services | Metal Coatings

Phosphate coatings are a crystalline conversion coating for steel and other metals that is formed on a ferrous metal substrate. The process of Phosphate coating is employed for the purpose of pretreatment prior to coating or painting, increasing corrosion protection and improving friction properties of sliding components. In other instances, phosphate coatings are applied to threaded parts and ...

An Overview of Phosphate Mining and Reclamation in Florida

The Process of Phosphate Mining in Florida Phosphate mining in Florida is a strip-mining process. Overburden, the layers of material above the phosphate, is removed to expose the phosphate reserve (matrix). Before mining, exploratory cores are taken to measure the depth of the overburden and the thickness of the phosphate matrix. This coring

The Beginners Guide to Manganese Phosphate Coating

Manganese phosphate coating is a popular phosphate coating due to its hardness and outstanding wear resistance. Phosphate coatings are used to pre-treat metal prior to coating or painting and to increase specific metal properties like corrosion resistance. Manganese is a chemical element, found in combination with iron and in other minerals.

Zinc Phosphate Coatings - Advanced Technical Finishing

The zinc phosphate coating process is a relatively simple one. The metal being treated reacts with the zinc phosphate solution and creates a durable surface layer made of small crystals. This surface layer provides protection for the material underneath from corrosion, but also provides a strong base coat for any future layers of paint or coatings.

7 tank hot phosphating process

"7 tank hot phosphating process" A discussion started in 2003 but continuing through 2018. 2003. Q. We use lot of sheet metal components in an industrial product with a powder coated finish. The basic pretreatment used before powder coating is 7 / 8 tank Hot process for cleaning & applying a thin phosphate coat.


8. 1933 Use of oxidizing agents like nitrate for acceleration Πcoating time: 21 5 minutes 9. 1934 Use of phosphate coating for cold working operations for metals 22 10. 1937 Spray phosphating Πphospating time: 60-90 seconds 23 11. 1940 Development of non-coating phosphate process based on sodium 24 or ammonium phosphates

Pretreatment for Painting | Products Finishing

1) Iron Phosphate Pretreatment Systems. Iron phosphate systems, also known as alkali metal phosphates, are used for parts that require a durable finish but are not exposed to severely corrosive environments. These systems can involve two to six stages, with the shortest sequence being a cleaner-coater stage followed by a tap-water rinse.