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Mixing galvanized and black iron pipes within the same system can present several challenges. One of the primary concerns is galvanic corrosion, a phenomenon that occurs when two dissimilar metals come into electrical contact in the presence of an electrolyte, such as water. In this scenario, the zinc coating of the galvanized pipe can corrode at an accelerated rate due to the electrical activity created by the differing materials. As a result, the lifespan of the system may be significantly reduced, leading to potential failures and costly repairs.
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The degree of substitution refers to the average number of hydroxyethyl groups attached to the cellulose backbone. This parameter significantly affects the polymer's hydrophilicity and solubility. HEC with a higher degree of substitution displays increased solubility in water due to the greater number of hydroxyl groups available for hydrogen bonding with water molecules. Consequently, formulators often choose HEC grades with varying degrees of substitution based on the desired viscosity and solubility characteristics for specific applications.
hydroxyethyl cellulose solubility
