Evaluation of Zerust Vapor Capsules Along with Cosmoline Rust Veto Aerosol Spray

Background: Roman Mueller/Ken Motsinger Associates, submitted Zerust Vapor capsules along with Cosmoline Rust Veto aerosol spray to Cortec Corporation for a corrosion inhibitor performance evaluation

Purpose: Evaluate the corrosion inhibitor protection offered by three different Zerust Vapor Capsules along with Cosmoline Rust Veto aerosol spray.

Method: Modified ASTM D 1748-83 (110 deg F, 100 % R.H.)

Sodium Nitrite Test

Materials: Environmental Chamber

6 one gallon jars

6 Carbon steel panels (Q-Panel SAE 1010 Carbon steel, ground both sides, 0.762 mm x 75.9 mm x 126 mm)

Zerust Vapor Capsule VC1-1 emitter

Zerust Vapor Capsule VC2-1 emitter

Zerust Vapor Capsule VC2-2 emitter

Cosmoline Rust Veto aerosol spray

Cortec VpCI-105 emitter

Cortec VpCI-101 emitter

EM Quant Nitrite test strips (Lot/Exp OC191325/Feb 04)

Procedure: The following was done.

  1. Zerust Vapor Capsule VC1-1 was attached to inside wall of a one gallon jar of which a carbon steel panel was hung from inside lid.
  2. Zerust Vapor Capsule VC2-1 was attached to inside wall of a one gallon jar of which a carbon steel panel was hung from inside lid.
  3. Zerust Vapor Capsule VC2-2 was attached to inside wall of a one gallon jar of which a carbon steel panel was hung from inside lid that was coated with Cosmoline Rust Veto aerosol spray.
  4. Cortec VpCI-101 emitter was attached to the inside wall of a one gallon jar of which a carbon steel panel was hung from inside lid.
  5. Cortec VpCI-105 emitter was attached to inside wall of a one gallon jar of which carbon steel panel was hung from inside lid.

(1), (2), (3), (4) and (5) were conditioned at room temperature for a period of 20 hours. After conditioning period, the one gallon jars were then exposed to modified ASTM D1748-83 (110 deg F, 100% R.H.) and observed daily for surface corrosion.

Results:

Modified ASTM D 1748-83 (110-115 deg F, 100% R.H.)

Test Setup

Time until corrosion

occurred (days)

Zerust Vapor Capsule VC1-1 attached to inside wall of a one gallon jar of

which a carbon steel panel was hung from inside lid.

14

Zerust Vapor Capsule VC2-1 attached to inside wall of a one gallon jar of

which a carbon steel panel was hung from inside lid.

16

Zerust Vapor Capsule VC2-2 attached to inside wall of a one gallon jar of

which a carbon steel panel was hung from inside lid that was coated with

Cosmoline Rust Veto aerosol spray.

20

Cortec VpCI-101 emitter attached to the inside wall of a one gallon jar of

which a carbon steel panel was hung from inside lid.

28

Cortec VpCI-105 emitter attached to inside wall of a one gallon jar of which a

carbon steel panel was hung from inside lid.

> 34

One gallon jar of which a carbon steel panel was hung from inside lid

(Control).

4

Photos attached

Conclusion: Cortec VpCI-101 emitter provided longer corrosion inhibitor protection than Zerust Vapor Capsule VC1-1, Zerust Vapor Capsule VC2-1, Zerust Vapor Capsule VC2-2 with Cosmoline Rust Veto aerosol spray applied to panel. Cortec VpCI-105 emitter provided longer corrosion inhibitor protection than Zerust Vapor Capsule VC1-1, Zerust Vapor Capsule VC2-1, Zerust Vapor Capsule VC2-2 with Cosmoline Rust Veto aerosol spray applied to panel.

Zerust vapor capsules are constructed of polyurethane foam containing within, masterbatch pellets of Dicyclohexylammonium nitrite.

Project #: 02-137(2)

Estimated Cost of Project: 4 hours

To: Ken Motsinger/Ken Motsinger Associates

For: Mollewood Export

From: Bob Berg

Date: 8/27/02

cc: Boris Miksic

Anna Vignetti

Art Ahlbrecht

Margarita Kharshan

Cliff Cracauer

Vanessa Schultz

Bob Boyle