Capabilities

 

Process + Partnership. Top businesses from coast to coast trust AeroDynamics for their metal finishing needs

We understand the importance of precision plating as it relates to critical aspects of form, fit, and function. We work closely with you to engineer customized processes for your first articles and prototypes.

Our masking expertise includes the use of wet spray, wax, lacquer, paint, industry proven tapes, and a variety of different plugs individually designed for your application. These techniques are employed by trained masking specialists dedicated exclusively to your program.

Our racking & tooling proficiency allows us to develop customized solutions to any racking & tooling challenges. We use quality materials tailored to ensure that our plating process meets the requirements of your drawings.

Our close relationship with our vendors guarantees that our chemistries and equipment are correctly monitored and upgraded to meet modern advances within the industry.

We are open to working with all customers to plan and provide any processes that may or may not be currently offered by AeroDynamics. We thrive on the challenge of developing effective solutions for our customers and understand our vital position within their supply chain.

*AeroDynamics also complies with MIL-S-5002, MIL-STD-171, MIL-DTL-14072 standards

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We offer a variety of capabilities such as NADCAP certified metal finishing, Anodize, Chemfilm, Chrome, Electroless & Electrolytic Nickel, and Passivation.

We offer a variety of capabilities such as NADCAP certified metal finishing, Anodize, Chemfilm, Chrome, Electroless & Electrolytic Nickel, and Passivation.


Anodize

Anodizing of aluminum is an electrolytic process used to increase the thickness and hardness of the natural aluminum oxide surface layer. This porous oxide is able to absorb and accept dye pigments to alter the aesthetics or other impregnations such as PTFE, commonly known as Teflon, which increases lubricity and wear resistance.

  • Corrosion resistance
  • Increased hardness
  • Wear resistance
  • Improved lubricity

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Specifications

AMS 2471
Undyed
AMS 2472
Dyed
AMS 2469
Hardcoat
MIL-A-8625

Type II: Sulfuric acid anodize
Type IIB: Thin sulfuric acid anodize
Type III: Hard anodic Coatings

Class 1: Non-dyed
Class 2: Dyed

Chemical film

Chemical Film is a chromate conversion coating for aluminum and its alloys that creates a protective finish on the surface of the metal. Since there is no growth associated with this conversion, the dimensions of the part remain virtually unchanged after processing. This treatment also changes the surface properties of the aluminum making it less susceptible to corrosion and more compatible with paints, powder coatings, and other finishing processes. Chemical Film is also commonly referred to as Chemfilm, Chromating, Alodine, and Iridite.

  • Corrosion resistance
  • Increased surface energy/Paintability
  • No dimensional impact
  • Electrically conductive

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Specifications

MIL-DTL-5541

Type 1: Contains hexavalent chromium – Clear or yellow coating
Type 2: Does not contain hexavalent chromium (RoHS compliant) – Clear coating only

Class 1A: Maximum corrosion resistance
Class 3: Higher electrical conductivity
MIL-C-5541
Class 1A: Maximum corrosion resistance
Class 3: Higher electrical conductivity
AMS 2473
(Scope) This specification establishes the requirements for chemical-film (conversion) coatings on aluminum alloys
MIL-DTL-81706B
(Scope) This specification covers chemical conversion materials used in the formation of coatings by the reaction of the material with the surfaces of aluminum and aluminum alloys

Chrome

Chrome plating is the electrolytic process of depositing chromium onto a variety of metallic substrates. Three common types of chrome plating are decorative, hard, and flash chrome processes. These processes vary by electrolyte, electrical current, and soak time, all of which affect the final uniformity, wear resistance, corrosion resistance, hardness, and appearance of the finish.

  • Increased hardness
  • Corrosion resistance
  • Improved lubricity
  • Wear resistance

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Specifications

AMS 2406
AMS 2460 / FED QQ-C-320
Class 2: Engineering plating
Type II: Satin Finish

Electroless Nickel
(RoHS Compliant)

Electroless Nickel is an autocatalytic chemical reaction that deposits nickel using a nickel phosphate compound. Since the process is reaction based and independent of current densities, these coatings tend to be uniform in thickness across complex geometries eliminating areas of thin deposit thickness. This same feature allows for tighter thickness tolerances than when coating with electrolytic nickel. EN deposits are also less porous than their electrolytic counterparts which provide better corrosion resistance. The density, melting point, conductivity, hardness, wear resistance, and ductility of these deposits can be altered by varying phosphorous content.

  • Uniform thickness
  • Corrosion resistance
  • Increased hardness
  • Wear resistance
  • Increased Solderability

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Specifications

ASTM B733

Type: Phosphorous Content
Type IV: 5-9 wt%

Service Condition: Minimum Thickness
SC0: Minimum Service 0.1µm
SC1: Light Service 5µm
SC2: Mild Service 13µm
SC3: Moderate Service 25µm
SC4: Severe Service 75µm

Class: Post Plating Heat Treatment
Class 1: As plated, no heat treatment
Class 2: Heat treatment to increase hardness [type dependant]
  • Type 1: 260C for 20h, 285C for 16h, 320C for 8h, or 400C for 1h
  • Type 2: 350-380C for 1h
  • Type 3: 360-390C for 1h
  • Type 4: 365-400C for 1h
  • Type 5: 375-400C for 1h
Class 3: Heat treatment for HER & increased adhesion (for steel only)
  • 180-200C for 2-4h
Class 4: Heat treatment to increase adhesion (for heat treatable Al & carburized steel)
  • 120-130C for 1-6h
Class 5: Heat treatment to increase adhesion (for non-heat treatable Al, Cu, & Be)
  • 140-150C for 1-2h
Class 6: Heat Treatment to increase adhesion (for Ti)
  • 300-320C for 1-4h
AMS 2404
Class: Post Plating Heat Treatment
Class 1: As plated, no heat treatment
Class 2: Heat treatment to increase hardness 450F for >4h, 500F for >4h, 550F for >2h, 650F for 1-1.5h, or 750F for 0.5-1h
Class 3: Heat treatment to improve adhesion (for non-heat treatable Al & Be alloys only) 375±15F for 1-1.5h
Class 4: Heat treatment to improve adhesion (for heat treatable Al alloys only) 250±10F for 1-1.5h
MIL-C-26074/ AMS-C-26074

Grade: Minimum Thickness
Grade A:
0.0010” (25µm)
Grade B:
0.0005” (13µm)
Grade C:
0.0015” (38µm)

Class: Post Plating Heat Treatment
Class 1:
As plated, no heat treatment
Class 2:
Heat treatment to increase hardness
Class 3:
Heat treatment to improve adhesion (for non-heat treatable Al & Be alloys only)
Class 4:
Heat treatment to improve adhesion (for heat treatable Al alloys only)


Electrolytic Nickel

Electrolytic nickel is a process where nickel is deposited using direct current electricity. Unlike electroless nickel coatings, the resulting coating is essentially pure nickel. Chemistries can be altered to enhance the ductility of the final finish. Additional additives are also typically introduced to these baths in order to smooth and brighten the metal.

  • Corrosion resistance
  • Increased hardness
  • Increased ductility
  • Wear resistance

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Specifications

AMS QQ-N-290
Class 2: Engineering plating

Passivation

Passivation is the process of removing iron and other surface contaminants from stainless steel materials. It also can help repair any damaged areas in the protective chromium oxide layer by facilitating its oxidation. Additions of strong oxidizers, such as sodium dichromate, can further accelerate oxide formation. Passivation ensures that the surface is free from corrosion, which can negatively affect the life and properties of stainless steel materials.

  • Corrosion resistance

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Specifications

AMS 2700 (AMS QQ-P-35)
Method 1: Passivation with nitric acid
Type 1: Low temperature nitric acid with sodium dichromate
  • 20-25 %vol nitric acid & 2-3 %wt sodium dichromate at 70-90F for a minimum of 30 minutes
Type 2: Medium temperature nitric acid with sodium dichromate
  • 20-25 %vol nitric acid & 2-3 %wt sodium dichromate at 120-130F for a minimum of 20 minutes
Type 3: High temperature nitric acid with sodium dichromate
  • 20-25 %vol nitric acid & 2-3 %wt sodium dichromate at 145-155F for a minimum of 10 minutes
Type 6: Low temperature nitric acid
  • 20-45 %vol nitric acid at 70-90F for a minimum of 30 minutes
Type 7: Medium temperature nitric acid
  • <20-25 %vol nitric acid at 120-140F for a minimum of 20 minutes
Method 2 Passivation with citric acid
  • 4-10 %wt citric acid at 141-160F for a minimum of 4 minutes
  • 4-10 %wt citric acid at 120-140F for a minimum of 10 minutes
  • 4-10 %wt citric acid at 100-119F for a minimum of 20 minutes
  • 4-10 %wt citric acid at 70-99F for a minimum of 30 minutes
ASTM A967

Nitric Treatments
Nitric 1: 20-25 %vol nitric acid & 2-3 %vol sodium dichromate at 120-130F for at least 20 minutes
Nitric 2: 20-45 %vol nitric acid at 70-90F for at least 30 minutes
Nitric 3: 20-25 %vol nitric acid at 120-140F for at least 20 minutes

Citric Treatments
Citric 1: 4-10 %wt citric acid at 140-160F for at least 4 minutes
Citric 2: 4-10 %wt citric acid at 120-140F for a minimum of 10 minutes
Citric 3: 4-10 %wt citric acid at 70-120F for a minimum of 20 minutes

ASTM A380
Code F: 20-50 %vol nitric acid at 70-100F for at least 30 minutes or 120-160f for at least 10 minutes
Code G: 20-40 %vol nitric acid & 2-6% wt sodium dichromate at 70-100F for at least 30 minutes or 120-160F for at least 10 minutes
Code H: 20-50 %vol nitric acid at 110-130F for at least 20 minutes or 70-100F for at least 60 minutes
Code I: 20-25 %vol nitric acid & 2-6 %wt sodium dichromate at 70-100F for 30 minutes or 120- 130F for at least 15 minutes
Code J: 20-50 %vol nitric acid, 2-6 %wt sodium dichromate at 70-120F for at least 25 minutes