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Evaluation The Anti-Corrosion Protection Of Parts Using APL04 Test Method

BACKGROUND:

Samples: A B C D
Description: BioCor Only BioCor + RP Liquid Climacor V Only Climacor V +  RP Liquid
Micron (µ): 105 105 108 110
Nitrites Negative Negative Negative Negative
Date Tested 20 - 30 March 2015

TESTING OF ANTI-CORROSIVE PROPERTIES:

Test Method: APL04 (Long Test)
Test Metals Used: Parts supplied by customer
Temperature Cycle: 1 cycle consists of 6 hours at 40ºC and 6 hours at 10°C
Duration: 24 hours equilibration and 5 days on test (2 cycles per day)

METAL PREPARATION:

The metal parts were cleaned and degreased before use.

Results:

On a scale of 0 – 100%
(where Excellent = 0-2%, Very Good = >2 – 10%, Good = >10 – 20%, Poor = >20 – 50%, Very Poor = >50 – 100%)

Sample Result
Control Very Poor
A Excellent
B Good
C Excellent
D Good

 

Control
Control
BiCor Only
BiCor + RP Liquid
BiCor + RP Liquid
ClimacorV Only
ClimacorV Only
Climaco V + RP Liquid
Climaco V + RP Liquid
 

Comments:

This test was carried out in order to examine our rust removal solution for steel parts from Customer M. Five metal parts were received for testing Three of which were cleaned and degreased with methanol in order to remove the RP liquid from the surface of the metal. One of the cleaned metals was then wrapped in BioCor VCI film, a second was wrapped in Climacor V film, and the third cleaned metal was used as a control. The remaining two coated metals were placed in BioCor film and Climacor V film, respectively.

All five metals were then placed in the climatic chamber where they were subjected to alternating temperature and relative humidity creating a very corrosive atmosphere.

On completion of the test, the control was very badly corroded indicating the severity of the test. The cleaned metals wrapped in BioCor only and Climacor V films were completely from corrosion, indicating that the VCI films provides excellent protection from corrosion for this metal. The metals coated in RP Liquid and tested with both films appeared to have staining on the surface of each metal.

One possible cause for the staining may be the presence of sodium salts in the RP Liquid which when used with BioCor and Climacor V material will cause hygroscopic sites to form on the surface of the metal.