NACORR Rust & Corrosion Inhibitors

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2 King Industries provide formulators the means to impart corrosion resistance to aqueous and non-aqueous systems. NACORR can be used as the primary corrosion inhibitor or in combination with environmentally friendly anti-corrosive pigments. They are compatible with a wide variety of resins used in primers and direct to metal topcoats for a multitude of industrial applications. Benefits Improved corrosion protection in clearcoats and highly pigmented systems Liquid materials make for easier incorporation Synergy with anti-corrosive pigments to replace chromates and other environmentally unacceptable anti-corrosive pigments Improved pigment dispersion and gloss when added to the pigment grind (for solventborne coatings) Enhanced cure rates of amino crosslinked systems, especially with NACORR 1552 (zinc salt) NACORRs are based on salts of hydrophobic organic acids. They are available in different solvents to accommodate the broad range of coating technologies currently used. Standard solvents are Mineral Spirits or 2-Butoxyethanol. Mechanism The NACORR molecules have a polar group and a long hydrophobic tail. The NACORR products prevent corrosion by two distinct mechanisms: The metal group is attracted to the metal substrate where it helps to electrically passivate any potential anodic sites The hydrophobic tail is oriented outward away from the metal substrate, excluding water from any potential anodic sites. Hydrophobic Barrier Layer Created by NACORR Coating Metal Substrate Anode NACORR Selection Chart by System SOLVENTBORNE WATERBORNE NACORR 1389 Used in Both Air Dry & Thermoset Systems NACORR 1389MS Recommended for 2K Urethane Systems NACORR 1389 Best Water Dispersability NACORR 1652 Improved Compatibility With Water NACORR 1652 Synergy With Heavy Metal Free Pigments NACORR 1552 Best Synergy With Zinc Anticorrosive Pigments NACORR 1151 Best Corrosion Performance NACORR 1352 General Purpose Alkyd & Urethane 1

3 PRODUCT Sulfonate Solvent % Active Attributes/Uses NACORR 1151 Barium Mineral Spirits 50 Best compatibility in solventborne systems. Best for low ph systems. NACORR 1352 Calcium 2-Butoxyethanol 50 Excellent in waterborne applications. NACORR 1389 Calcium 2-Butoxyethanol 45 Effective in both solventborne and waterborne coatings. Can be used in both air dry and thermoset systems. NACORR 1389MS Calcium Mineral Spirits 45 Developed for 2K solventborne urethane systems. NACORR 1552* Zinc 2-Butoxyethanol 50 Excellent adhesion. Excellent for solventborne primers. Catalytic in amino systems. NACORR 1652 Magnesium 2-Butoxyethanol 50 Hardest films in thermoset coatings. NACORR 4426 Sodium Complex Polymer/Water NA Excellent in waterborne emulsion systems. Effective on steel, galvanized steel and aluminum. * NACORR 1552 is an excellent catalyst and corrosion inhibitor for anodic acrylic electrocoating. Use Levels & Incorporation Generally, addition levels of 2-4% based on total weight of the paint are effective in enhancing corrosion protection. Due to the polarity of the metal group, highly pigmented systems or pigments with high surface areas may require higher levels of NACORR. This is due to the affinity of NACORR for the pigment surface. If active pigments are reduced or eliminated, they should be replaced with inert pigments to maintain solids and critical pigment volume concentrations. The NACORR products are based on a variety of different metal salts. The NACORR metal salts appear to be very system specific. Some work better than others, depending on the resin system, type of anti-corrosive pigment, and other formulation components. It is best to evaluate several of the NACORR products in your formulation to find the best performing product. Once a product is selected, it can be optimized by conducting a ladder study to determine a use level that best meets your performance needs. SYSTEM Solventborne Incorporation Method Can be post added with mild agitation or added to mill base. Water Reducible With Water In Mill Base No Water In Mill Base Emulsions, Colloids & Dispersions No Co-solvents With Co-solvents With Co-solvents & Amines If possible, remove water from base and add it to the letdown. Otherwise post-add under high agitation. Add % to mill base by premixing the NACORR, solvent and resin prior to pigment. Add balance to letdown prior to any water addition Post-add under high agitation during letdown prior to any water addition Premix with coalescing solvent prior to addition. A typical ratio of 1:1 is recommended. Next add mixture under high agitation prior to any water addition. Premix with coalescent and amine. Add under high agitation prior to any water. A typical starting ratio for premix: 50% NACORR, 45% coalescent and 5% amine by weight. Note: NACORR 1389 has best water dispersability and in most cases can be added directly to the letdown. 2

4 NACORR Performance NACORR liquid organic corrosion inhibitors provide improved corrosion resistance when used as the sole CI in coatings formulations. They allow the formulation of anticorrosive systems without anticorrosive pigments as may be required for high gloss direct to metal topcoats and clearcoats. NACORR Synergy With Anti-corrosive Pigments To achieve the level of corrosion resistance found with chromates and other environmentally unacceptable anti-corrosive pigments, the NACORR products are often used synergistically with more environmentally friendly anti-corrosive pigments. For a full listing of King Industries, Inc. formulations demonstrating synergy with a wide variety of commonly used anticorrosive pigments, including; borates, phosphosilicates and phosphates, please refer to Solventborne NACORR 1151 Performance in Solventborne Coatings As shown in Chart 3.1, when NACORR 1151 is post-added at a rate of 2% on the total weight of the coating, the anticorrosion benefits are clearly apparent in comparison to other organic corrosion inhibitors at the same dosage level. ADDITIVE NACORR 1151 mm Blister 1 10 Zinc Salt of Nitro Compound 10+ 4D Chart 3.1: King Formulation CI-204 Dry Film Thickness (DFT): 1 mil Alkyl Amine Phosphate 2-Benzothiazolylthio-Succinic Acid 10+ 2D 10+ 4D Blister Rank - 10 = no blister, 1 = large blister, D = dense, M = medium, F = few Creep evaluation - millimeters from scribe NEW! NACORR 1389 Performance in a Solventborne Polyester Thermoset Primer NACORR 1389 shows improved corrosion resistance and water resistance in both solventborne and waterborne coatings. Photo 3.2 displays the improved performance with 2% NACORR 1389 in a thermoset polyester solventborne primer system. Photo 3.2: King Formulation CI-208 Anticorrosive pigment: Strontium zinc phosphosilicate DFT: 1 mil + NACORR

5 Waterborne Synergy: Waterborne Acrylic Primer NACORR 1352 and Strontium Zinc Phosphosilicate King Formulation CI-101 (Photo 4.1) demonstrates the synergistic effect of NACORR 1352 with a strontium zinc phosphosilicate in a waterborne air dry acrylic primer. The use of NACORR 1351 in synergy with the anti-corrosive pigment (strontium zinc phosphosilicate) provided a significant improvement in the corrosion resistance. Photo 4.1: King Formulation CI-101 DFT: 1.1 mil + Strontium Zinc Phosphosilicate + NACORR 1352 NEW! NACORR 1389 Performance in Waterborne Coatings NACORR 1389 is effective in waterborne coatings and can be used in both air dry and thermoset systems. Photo 4.3 shows the improved performance with 2% NACORR 1389 in an air dried water reducible alkyd enamel. Anticorrosive pigment: None. Titaniumdioxide only. Photo 4.3: Air Dry Water Reducible Alkyd Enamel King Formulation CI Hours Salt Spray DFT: 1.1 mil 2% NACORR 1389 Photo 4.4 demonstrates the improvement in corrosion resistance when 2% NACORR 1389 is used in combination with a non-toxic anti-corrosive pigment (strontium zinc phosphosilicate) Photo 4.4: Thermoset Polyester Primer King Formulation CI-125 DFT: 1.1 mil 2% NACORR

6 King Industries has a long history of assisting customers with their application and formulating needs. Our experienced coatings chemists and state of the art testing equipment are available to solve the most demanding customer requirements. We are committed to providing the best service, technology and products to the paints and coatings industry. Contact Us: King Industries, Inc - USA Coatings Additives Division Science Rd. Norwalk, CT Phone (203) coatings@kingindustries.com King Industries - Europe Mr. Marcel Groenewoud Noordake EZ Waddinxveen The Netherlands Phone: mg@kingintl.nl King Industries - Asia Dr. Zhiqiang Alex He 42 Ju Lin Ya Yuan Rich Mond Hill (Juhaoyuan) Bo Ai 7th Road Zhongshan, Guangdong, China Phone: alex.he@kingindustries.com The conditions of your use and application of our products, technical assistance and information (whether verbal, written or by way of product evaluations), including any suggested formulations and recommendations, are beyond our control. Therefore, it is imperative that you test our products, technical assistance and information to determine to your own satisfaction whether they are suitable for your intended uses and applications. Such testing has not necessarily been done by King Industries, Inc. ("King"). The facts, recommendations and suggestions herein stated are believed to be reliable; however, no guaranty or warranty of their accuracy is made. EXCEPT AS STATED, THERE ARE NO WARRANTIES, EXPRESS OR IMPLIED, OF MERCHANTABILITY, FITNESS OR OTHERWISE. KING SHALL NOT BE HELD LIABLE FOR SPECIAL, INCIDENTAL, CONSEQUENTIAL OR EXEMPLARY DAMAGES. Any statement inconsistent herewith is not authorized and shall not bind King. Nothing herein shall be construed as a recommendation to use any product(s) in conflict with patents covering any material or its use. No license is implied or granted under the claims of any patent. Sales or use of all products are pursuant to Standard Terms and Conditions stated in King sales documents. NACORRUS/2014