Yip\'s Chemical Group Co., Ltd.

Water-based metalworking fluid aims to to make its pH value, concentration ratio, amount ofbacteria and other technical indicators in the set range so as to prolong theservice life. Even if there is good performancewater-based metal working fluid, if there is no attention paid to dailymaintenance and management, it also cannot keep a long-term performance, andwill shorten the service life; and the general performance of the water-basedmetal working fluid, such as attention to maintenance management, also itsperformance to maintain long-term. Simple daily maintenance of water-basedmetal working fluid must be based on following methods:

Content of control	Index	Methods	Test frequency
Concentration	Recommended concentration	Handheld refractometer	1 time/day ( or longer)
pH value	＞8.5 (depending on products)	Electronic pH meter, pH test paper	1 time/day ( or longer)
Rust	Level 0	Field product rust and laboratory test	1 time/week ( or longer)
Anti-foaming performance	Foams not allowed to be piled up in great quantity	Visual inspection or laboratory test	1 time/week
Oil spill	Cutting fluid not allowed to be covered	Visual inspection	1 time/week
Metal fragments	Fragments not piled up	Visual inspection	1 time/day