How hard is hard chrome plating?

Asked By: Tenesoya Thurling | Last Updated: 22nd April, 2020
Category: automotive car culture
4.9/5 (613 Views . 26 Votes)
Hardness Value of Industrial Hard Chrome Plating
Average hardness is in the range of 66 to 70 Rockwell C scale. A deposit of over 0.001-inch thick is essential before chromium will assume its true hardness characteristics when used over unhardened basis metals.

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Then, is chrome plating hard?

Hard chrome plating is an electroplating process in which chromium is deposited from a chromic acid solution. Thickness of hard chrome plating ranges from 2 to 250µm. Micro-cracked chromium has a Vickers hardness of 800-1000 kg/mm 2, while crack-free chromium has Vickers hardness between 425-700 kg/mm 2.

Similarly, what is the difference between chrome and hard chrome? The primary difference between decorative chrome and hard chrome plating is the thickness of the chrome plating on the final product. Chrome plating uses an electrolytic process that applies chromium plating to a metal component in an electrolytic bath at a rate of about 25 to 30 microns per hour.

Then, what are the problems of hard chrome plating?

Hard Chrome Plating Defects:

  • Dull / milky deposits: There are a number of potential causes for poor chrome appearance, but it is most commonly caused by a mismatch in current density and bath temperature.
  • Burnt deposits:
  • Poor or partial coverage:
  • Poor adhesion:
  • Roughness:
  • Pitting:
  • Excessive micro-cracking:
  • Mud Cracking:

What is the thickness of chrome plating?

Hard chrome plating leaves a layer of chrome from 0.0008 to 0.0050 in. (from 0.020 to 0.127 mm) thick on the surface of the metal. In contrast, thin dense chrome plating has a thickness from 0.0002 to 0.0006 inch (0.005 to 0.015 mm). The thickness of chrome plating varies depending on the application.

36 Related Question Answers Found

Why is chrome plating so expensive?

The chrome plating process is very expensive because of many factors. Stripping the old coatings from your parts creates hazardous waste that is much more expensive to separate and treat than chrome plating rinse water. Regulatory compliance is very time consuming and therefore expensive.

Will a magnet stick to Chrome?

Chrome isn't magnetic but the metal substrate generally is.

What is the process of chrome plating?

Chrome plating is the process by which an electrical charge is applied to a plating bath containing an electrolytic salt (chromium anhydride) solution. The electrical charge causes the chromium metal in the bath to fall out of solution and deposit onto various objects (usually metallic) placed into the plating bath.

How can you tell if something is chrome plated?

A. If it's non-magnetic, it's stainless. If it's highly reflective (like a mirror) and very slightly bluish or darkish, it's probably nickel-chrome plating. If it's bright but not really mirror-like, it may be stainless, or even acid zinc plated.

How do you remove chrome plating?

One of the simplest ways to remove chrome plating is to spray it with a commercial-grade oven cleaner. To do so, completely cover the chrome part with the cleaner and let it soak for 10 minutes. Then, wipe off the chrome and the cleaner and you're done.

Is Chrome harder than nickel?

Nickel isn't as hard as chrome and will age nicely with normal use. Usually the metal is copper plated before the nickel is applied. The copper is easier to polish then the bare metal and will give the nickel a smoother finish. The benefits of chrome are that it is very durable, corrosion resistant, and won't tarnish.

How much does chroming cost?

The general price range is between $500 and $2,000.

How do I repair a damaged Chrome?

How to Repair Damage to Chrome
  1. Sand the damaged spot and the surrounding area.
  2. Clean off any sanding residue with a clean cloth.
  3. Fill in any holes or uneven surfaces with a glazing compound.
  4. Use 320-grit sandpaper to sand over the glazing compound to make it even.
  5. Spray on a light coat of chrome self-etching primer to the entire chromed surface.

What causes pitting in chrome plating?


The two most common causes of pitting and services in a hard chrome plating bath are contaminants on the surface of the part and sticking bubbles.

What is skip plating?

Skip or step plating is sometimes due to an abnormal high plate speed (too high catalyst and complexors or too low inhibitor). Sometimes and in some chemistries, orthophosphite can slow plate speed.

What metals can be chromed?

The chromium plating is usually applied over bright nickel plating. Typical base materials include steel, aluminium, plastic, copper alloys, and zinc alloys. Decorative chrome plating is also very corrosion resistant and is often used on car parts, tools and kitchen utensils.

What causes Chrome to peel?

Chrome can begin flaking because of various reasons. Some of the reasons include cheap chrome plating, weather, rust underneath the chrome, salt water and damage to the chrome itself. Flaking or peeling chrome must be repaired very carefully to prevent the chrome from flaking worse.

Is nickel plating cheaper than Chrome?

Nickel plating is widely utilized for its traditional looks and cheaper price over chrome plating. Electroless nickel plating, on the other hand, is just as durable and corrosion resistant but has a nickel-phosphorus coating that leaves a glossier finish and sturdy texture.

Does chrome finish shiny?


Chrome is typically polished and very shiny, although the satin and brushed varieties can be more matte. It's used in both decorative and industrial purposes because it is corrosion-resistant and has a high level of lustre. It's also a very light metal. Stainless steel is more durable than chrome.

Can you chrome over Chrome?

It is possible to plate Hard Chrome over Hsrc Chrome provided the initial coating is more than 100 microns.

Can you hard chrome stainless steel?

Compared to other forms of steel, stainless alloys do not need corrosion resistance as much as different variations do. Primarily, a chrome plating gives stainless steel added durability to withstand regular wear and tear, which can be a problem for some variations.