metal panel corrosion testing with deforest corrosion

DeForest Enterprises, Inc.Focusing On Product Differentiation, Market Needs, &

Performance Improvement

Metal Panel Submersion Testing, 4/2/19

Metal Panel Submersion Testing

DeForest Standard Method Panels submerged halfway into solution with corrosion inhibitor, in sealed glass jars Top half of panels are in the vapor phase Tested in solutions of standard hard water (100ppm as CaCO3 & 71ppm as chlorides),

unless otherwise noted Corrosion inhibitors tested at varying concentrations (by weight) “Blank” panels- same testing water, no corrosion inhibitor

Standard Metals Aluminum Panels: Bare Aluminum, #2024 Steel Panels: Cold Rolled Steel (Mild), SAE 210 Copper Panels: #110 Copper (99.95% Cu) Brass Panels: #260 Brass Alloy (30% Zn / 70% Cu)

DeForest Enterprises, Inc.Water Soluble Corrosion InhibitorsCorrosion Testing

DeForest Enterprises, Inc.Water Soluble Corrosion InhibitorsComparison of Multi-Metal Inhibitors

Blank 1% 0.5% 0.25%

2024 Bare Aluminum 120 days RT

1% 0.25% Blank

2024 Bare Aluminum90 Days RT

• Bottom half of panels are submerged in solution containing corrosion inhibitor, top half of panels are in the vapor phase• Solution contains 0.25% to 1.0% by weight corrosion inhibitor in hard water (100ppm CaCO3 / 71ppm as chloride)

DeCORE AFCI-45 45% active, mixed carboxylate (alkali salt) Amine-free No azoles, borates, phosphorous, nitrites

DeCORE APCI-95MOD 100% active, amine carboxylate Contains MEA and TEA Contains azole chemistry


0.25% 0.5% 1.0%

2024 Bare Aluminum 1 Year RT

1% 0.25% Blank

2024 Bare Aluminum1 Year RT





Blank 0.25% 0.5% 1.0%

SAE 210 Cold Rolled Steel120 Days RT

1% 0.25% Blank

SAE 210 Cold Rolled Steel90 Days





0.25% 0.5% 1.0%

SAE 210 Cold Rolled Steel1 Year RT

1% 0.25% Blank

SAE 210 Cold Rolled Steel1 Year RT





Blank 0.25% 0.5% 1.0%

110 Copper Panels120 Days RT

1% 0.25% Blank

110 Copper Panels90 Days RT





0.25% 0.5% 1.0%

110 Copper Panels1 Year RT

1% 0.25% Blank

110 Copper Panels1 Year RT





Blank 0.25% 0.5% 1.0%

260 Brass Panels120 Days RT

1% 0.25% Blank

260 Brass Panels90 Days RT







0.25% 0.5% 1.0%

260 Brass Panels1 Year RT

1% 0.25% Blank

260 Brass Panels1 Year RT


DeForest Enterprises, Inc.Water Soluble Corrosion InhibitorCorrosion Testing: Flash Rust Protection at pH ~3 to ~5.5

Procedure: Cold rolled steel panels were placed into each solution and allowed to soak for ~1 hour at room temperature. The steel panels were removed and allowed to air dry without rinsing.

No rust forms on the panels if DeCORE AFCI-45 present.

DeCORE AFCI-45 @ 1% by weight (0.45% active)

SAE 210 Cold Rolled Steel

First Beaker: Acidified tap water (pH 7.01) with a few drops of a10% citric acid solution to finalpH 5.35

Second Beaker: 1% by weight DeCORE AFCI-45 added to acidified tap water to final pH 5.39

Third Beaker: Acidified distilled water (pH 5.53) with a few drops of a 10% citric acid solution to final pH 3.45

Fourth Beaker: 1% by weight DeCORE AFCI-45 added to acidified distilled water to final pH 5.38

DeForest Enterprises, Inc.Hydrotrope Cloud Point Comparison5% NP-9 w/ 3.75% hydrotrope (by weight, as-is)

SMP = Sodium Metasilicate Pentahydrate / TKPP = Tetrapotassium Pyrophosphate / SXS-40 = Sodium Xylene Sulfonate 40%

0

10

20

30

40

50

60

70

80

90

5% NaOH 10% NaOH 5% TKPP 5% SMP

Clou

d Po

int (

C)

Test Formulation: 5% NPE-9, 3.75% Hydrotrope (by wt.), 91.25% Electrolyte

DeCORE AFCI-45DeTROPE CA-100 (50% soln)

DeTROPE SA-45

DePHOS H-66-872

SXS-40

No hydrotrope

DeCORE AFCI-45: multi-metal, amine-free corrosion inhibitor also an excellent hydrotrope

DeForest Enterprises, Inc.Water Soluble Corrosion InhibitorsCorrosion Testing- In Standard Hard Water

Blank 0.25%, 0.5% Blank 0.25% 0.5%• Bottom half of panels are submerged in solution containing corrosion inhibitor, top half of panels are in the vapor phase• Solution contains 0.25% to 1.0% by weight corrosion inhibitor in hard water (100ppm CaCO3 / 71ppm as chloride)

DeCORE IDMT-100100% Active Amine Carboxylate

110 Copper Alloy 90 Days RT

110 Copper Alloy 9 Months RT


Blank 0.25%, 0.5% Blank 0.25% 0.5%• Bottom half of panels are submerged in solution containing corrosion inhibitor, top half of panels are in the vapor phase• Solution contains 0.25% to 1.0% by weight corrosion inhibitor in hard water (100ppm CaCO3 / 71ppm as chloride)

260 Brass Alloy 90 Days RT

260 Brass Alloy 9 Months RT



Blank, 0.25%, 0.5%

90 Days 9 Months

Blank, 0.25%, 0.5%



Blank, 0.25%, 0.5%

90 Days 9 Months

Blank, 0.25%, 0.5%, 1%



0.5% DeCORE IMT-100LF, Steel Panels100% Active Amine-Carboxylate

30 Days in Standard Hard Water (71 ppm as chloride)

Blank Room Temp 50°C


Blank Room Temp


9 Months in Standard Hard Water @ RT (71 ppm as chloride)

DeForest Enterprises, Inc.Water Soluble Corrosion InhibitorsCorrosion Testing- In Higher Chlorides

Blank Room Temperature


30 Days in Higher Chlorides(200 ppm as CaCO3 & 142 ppm as chloride)


DeTROPE CA-100, 9 Month Results100% Active Amine- Carboxylate

Blank, 0.25%, 0.5%, 1%

2024 Bare Aluminum SAE 210 Cold Rolled Steel

Blank, 0.25%, 0.5%, 1%

DeForest Enterprises, Inc.DeTERIC LP Corrosion Inhibition PropertiesCorrosion Testing in Standard Hard Water

DeTERIC LP, Sodium Lauriminodipropionate

Hard Water: 100ppm CaCO3 / 71ppm as chlorideCold Rolled Steel, 72 hours

Blank 0.5% active

DeForest Enterprises, Inc.DeTERIC LP Corrosion Inhibition PropertiesCorrosion Testing in Standard Hard Water


Hard Water: 100ppm CaCO3 / 71ppm as chlorideBare Aluminum, 72 hours

Blank 0.5% active

DeForest Enterprises, Inc.DeTERIC LP Corrosion Inhibition PropertiesCorrosion Testing- In Acids


In 10% HCl (by weight)Cold Rolled Steel, 72 Hours

Blank 0.1% active


Blank 0.1% active

72 hours 72 hours

Blank 0.1% active

In 10% Phosphoric Acid (by wt.)Cold Rolled Steel

In 10% Sulfuric Acid (by wt.)Cold Rolled Steel



DeTERIC LP, Sodium LauriminodipropionateIn 10% HCl (by weight)

24 hours, Aluminum Panels

Blank 0.1% active

48 hours, Aluminum Panels

Blank 0.1% active


DeTERIC LP, Sodium LauriminodipropionateIn 10% Sulfuric Acid (by weight)

24 hours, AluminumBlank 0.1% active

DeForest Enterprises, Inc.Thank You!

DeForest Enterprises, Inc.Amtec Center6421 Congress AvenueBoca Raton, FL 33487

561-994-9696561-994-9995 (fax)

Website: www.deforestenterprises.comSend inquiries to [email protected]

http://www.deforestenterprises.com/

mailto:[email protected]

metal panel corrosion testing with deforest corrosion

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