This paper investigates the compressive strength loss of wollastonite modified magnesium ammonium phosphate cement (MAPC) and magnesium potassium phosphate cement (MKPC) paste after exposure to NaCl freeze-thaw cycles. alternation of dry-wet (water medium and 3 % NaCl medium). H2SO4 and NaOH corrosion. The compressive strength loss was applied to characterize the corrosion degree of s... https://edgeclothing.shop/product-category/sunglasses/