Heavy Zinc MIL-DTL-16232 Type Z

Cor-Pro Systems, Inc. provides heavy zinc phosphate coating services for critical equipment in Houston, Texas and nearby Gulf Coast areas.

coating services for equipments

Heavy Zinc MIL-DTL-16232 Type Z is a type of phosphate conversion coating applied on iron and steel parts and equipment. The end product is an adherent crystalline finish that works as an excellent base and pretreatment for complementary corrosion prevention methods such as oils and other treatments.

Phosphate conversion coatings are formed when zinc, magnesium, and iron phosphate salts are dissolved in phosphoric acid and applied to iron and steel. The chemical reaction creates a protective surface layer that displays strong corrosion inhibiting properties, lubricant absorption, and wear resistance.

If you have questions regarding coatings or want to get a custom quote for your heavy zinc phosphate coating needs, call Cor-Pro in Houston, Texas (Gulf Coast) at 713-896-1091, or send an e-mail to quotes@cor-pro.com.


Corrosion Protection: What Are  Are Heavy Zinc Phosphate Coatings?

Heavy zinc phosphate coatings are primarily used as a base or pretreatment for the rust proofing and anti-galling of steel. Zinc based coatings provide higher corrosion resistance compared to magnesium and iron-based phosphate conversion coatings.

Heavy zinc phosphate coatings are able to retain rust preventative oils and waxes by acting as an absorbent substrate that holds the treatment on the surface. When supplemented with other corrosion protection methods, heavy zinc phosphate coatings can extend the service life of critical parts and equipment.

The thickness of heavy zinc phosphate coatings can range from 1,000 to 3,000 mg/ft2. It produces consistently uniform coatings applied via a coating bath or immersion. Depending on the supplemental treatment, heavy zinc phosphate coatings can withstand 48-480 hours of neutral salt spray exposure per ASTM method B-117.

Corrosion Protection Coatings: Specifications Of Heavy Zinc MIL-DTL-16232 Type Z


Heavy zinc phosphate coatings can be customized depending on the following specifications:

  • Class 1: Supplementary preservative treatment or coating, as specified
  • Class 2: Supplementary treatment with preservative conforming to MIL-PRF-16173, Grade 3 or MIL-PRF-3150
  • Class 3: No supplementary treatment
  • Class 4: Chemically converted (may be dyed to color as specified) With no supplementary coating or coating as specified

Corrosion Protection: Why Are Coatings Important?

Companies can save up to 25 to 30% of annual corrosion costs in the US if they invest in quality coatings. Without proper coatings, corrosion can have damaging effects on valves, motors, pumps, fasteners, switches, belts, and other mechanical equipment.

In infrastructure, the annual direct cost is around $22.6 billion. Corrosion costs total $47.9 billion for utilities such as gas, water, and electricity.

Reduce costs

  • 25% of costs caused by corrosion is avoided by applying existing knowledge on corrosion protection such as coatings.

Reduce accidents

  • Work-related accidents cost the US $250 billion every year. A lot of those incidents are caused by faulty work equipment. If a structure is free of corrosion, the risk for accidents is significantly reduced.

Save time

  • In the event your equipment does falter due to corrosion, repairing it will take time. Once operations stop, the delay in production will also mean profit losses.

VELOCITY: Delivery in Hours, Not Days

Cor-Pro’s Velocity coating service is specifically geared toward rapid-response tasks.

If you have a pressing deadline, Velocity is the answer to your prayers. This premium service utilizes every advantage of the Cor-Pro methodology, including multiple accuracy checks, superbly trained crew, and round-the-clock facility operation to meet delivery schedules.

We take pride in the Cor-Pro Velocity Service. The purpose and responsibility of this offering is to ensure that your urgent coating projects are processed and delivered expeditiously. We have assembled a team of Cor-Pro’s best experts to staff the Velocity Desk everyday at 11:00 AM and 2:00 PM to process any project that require Velocity Service.

Only Cor-Pro can offer you this kind of responsiveness while guaranteeing a superior level of professionalism and commitment to quality.

For a custom consultation or a quote, call Cor-Pro in Houston, Texas (Gulf Coast) at 713-896-1091, or send an e-mail to quotes@cor-pro.com.